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WO2011039842A1 - Dispositif de reproduction du son - Google Patents

Dispositif de reproduction du son Download PDF

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Publication number
WO2011039842A1
WO2011039842A1 PCT/JP2009/066969 JP2009066969W WO2011039842A1 WO 2011039842 A1 WO2011039842 A1 WO 2011039842A1 JP 2009066969 W JP2009066969 W JP 2009066969W WO 2011039842 A1 WO2011039842 A1 WO 2011039842A1
Authority
WO
WIPO (PCT)
Prior art keywords
sound
speaker
housing
opening
speaker unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2009/066969
Other languages
English (en)
Japanese (ja)
Inventor
明彦 江波戸
修 西村
貴博 蛭間
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to PCT/JP2009/066969 priority Critical patent/WO2011039842A1/fr
Publication of WO2011039842A1 publication Critical patent/WO2011039842A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2853—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line
    • H04R1/2857—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
    • H04R1/288—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/027—Electrical or mechanical reduction of yoke vibration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops

Definitions

  • the present invention relates to a sound reproducing device in a thin display device such as a liquid crystal television.
  • Patent Documents 1 to 3 disclose a speaker device that suppresses vibration by increasing the housing and support rigidity.
  • Patent Document 4 discloses a speaker device that actively controls an auxiliary speaker provided to a main speaker to cancel unwanted sounds such as a case diffracted sound and a case vibration sound generated by a case vibration. Yes. These relate to an algorithm of a technique for improving a time domain impulse response waveform to one pulse.
  • a double speaker driving method and a double voice coil method as acoustic correction technology by digital control using an auxiliary speaker.
  • the double speaker drive system two speakers are mounted inside the enclosure, and the back pressure of the main speaker is removed by controlling the two speakers in the same phase, thereby improving the characteristics of the minimum resonance frequency even in a small volume.
  • the output impedance of the drive amplifier is improved by flattening the electric impedances near the two lowest resonance frequencies by interference (see, for example, Patent Document 5).
  • Speakers employed in thin display devices and the like are generally elliptical speakers.
  • an elliptical speaker is also used as an auxiliary speaker and placed adjacent to the main speaker, the sound source centers of the main speaker and the auxiliary speaker are separated from each other. It becomes.
  • interference non-uniformity occurs in places other than the front of the speaker, and the area where the sound quality is improved becomes narrower. Therefore, the sound reproducing device is required to be able to be disposed in a small space and to reduce unnecessary vibration sound generated from the thin housing.
  • the present invention has been made in order to solve the above-described problems, and the object thereof is to improve the sound quality by suppressing unnecessary vibration sound generated from a thin casing that can be arranged in a small space.
  • An object of the present invention is to provide a sound reproducing apparatus capable of
  • a housing A first speaker unit that is provided in the housing and emits a first sound wave;
  • a second speaker unit that has the same sound reproduction characteristics as the first speaker unit, is provided in the housing, and emits a second sound wave;
  • An opening that penetrates through the housing and radiates the first and second sound waves to the outside of the housing;
  • a fixing portion for fixing the first and second speaker units to the housing; Comprising The width D in the longitudinal direction of the opening satisfies D ⁇ c / 2f where f is the frequency of the vibration sound to be reduced in sound pressure and c is the sound speed.
  • the sound reproducing device of the present invention can be arranged in a small space, and the sound quality can be improved.
  • FIG. 1 is a cross-sectional view schematically showing a sound reproduction device according to a first embodiment. It is sectional drawing which follows the II line shown to FIG. 2A.
  • FIG. 2B is a sectional view taken along line II-II shown in FIG. 2A. It is the top view which looked at the sound reproduction device shown in Drawing 2A from the bottom.
  • It is a schematic diagram which shows the distance between the sound source centers of two speaker units. It is a schematic diagram which shows the sound source center of an elliptic speaker.
  • FIG. 13B is a sectional view taken along line III-III shown in FIG. 13A. It is sectional drawing which follows the VI-VI line shown to FIG. 13A. It is a front view which shows the external appearance of the sound reproduction apparatus shown to FIG. 13A. It is a sectional side view which shows the example in which a sound-absorbing material is provided in order to reduce the resonance in a housing
  • FIG. 1A is a front view schematically showing an appearance of a thin display device 10 including the sound reproducing device according to the first embodiment of the present invention
  • FIG. 1B is an arrangement of speaker devices 24 in the thin display device 20.
  • the thin display device 20 includes a housing 21 and a stand 22 that supports the housing 21, and a display panel 23 that displays an image is provided on the front surface of the housing 21.
  • a pair of speaker devices 24 are arranged below the display panel 23 so as to output sound toward the bottom of the housing 21. Openings are provided at positions corresponding to the speaker devices 24 at the bottom of the housing 21, and sound waves radiated from the speaker devices 24 are led out of the housing 21 through the openings.
  • the casing 21 defines the outer shape of the thin display device 20, it is formed in a box shape with a small depth and a thin space inside.
  • the horizontal scanning line direction is assumed to be left and right, and the vertical direction is assumed to be up and down.
  • the thin display device 20 includes a tuner (not shown) that receives and demodulates a television broadcast signal, and an acoustic signal is generated by an acoustic signal generator (not shown) according to the demodulated signal.
  • This acoustic signal is amplified by an amplifier and input to each speaker device 24, and the acoustic signal is converted into sound by each speaker device 24.
  • FIG. 2A shows a schematic configuration of the sound reproducing device according to the first embodiment.
  • 2B is a sectional view taken along line II shown in FIG. 2A
  • FIG. 2C is a sectional view taken along line II-II shown in FIG. 2A
  • FIG. 2D is shown in FIG. 2A.
  • It is a top view which shows the sound reproducing device seen from the direction of arrow A.
  • the sound reproducing device shown in FIG. 2A corresponds to one of the pair of speaker devices 24 included in the thin display device 10 shown in FIGS. 1A and 1B.
  • 2A to 2D shows a part of the housing 21 shown in FIG. 1A. As shown in FIG.
  • the sound reproducing device includes a speaker diaphragm 1, first and second speaker units 4 and 5 each having a support portion 2 that supports the speaker diaphragm 1 and a voice coil 3. Since the casing 6 has a small depth, the first and second speaker units 4 and 5 employ elliptical speakers in which the speaker diaphragm 1 is formed in a substantially elliptical shape, and the first and second speakers. The units 4 and 5 are arranged in parallel along the longitudinal direction of each speaker diaphragm 1.
  • the first and second speaker units 4, 5 have substantially the same configuration as each other, as shown in FIG. 2A, i.e., the same component, for example, a speaker diaphragm.
  • the support portion and the voice coil are provided so as to have substantially the same outer dimensions.
  • the first speaker unit 4 functions as a main sound source speaker to which an acoustic signal generated from the television broadcast signal as described above is input.
  • the second speaker unit 5 is for canceling unnecessary sound such as casing vibration sound other than the original sound included in the acoustic signal output from the first speaker unit 4 caused by insufficient rigidity of the casing 6 and the support portion 2.
  • the sound wave is controlled so as to emit a sound wave having a phase opposite to that of the unnecessary sound. That is, the second speaker unit 5 outputs a control sound that cancels sounds other than the original sound output from the first speaker unit 4 according to the acoustic signal.
  • the unnecessary sound includes components other than the original sound according to the acoustic signal output from the first speaker unit 4, housing diffracted sound of the radiated sound radiated from the first speaker unit 4, It includes a case vibration sound generated by the case 6 being vibrated by the vibration of the speaker unit 4. Such unnecessary sound interferes with the control sound from the second speaker unit 5 to reduce the sound pressure.
  • the first speaker unit indicates a speaker for sound reproduction
  • the second speaker unit indicates a control speaker.
  • the speaker support portion 2 of each of the first and second speaker units 5 is bonded and fixed to the speaker fixing portion 7, the speaker fixing portion 7 is fixed to the housing 6, and the first and second speaker units 5 are connected to the housing. It is fixed to the body 6.
  • the speaker fixing unit 7 is a rubber material, a resin material, or the like in order to suppress the vibration of the second speaker unit 5 from being transmitted to the first speaker unit 4 and the housing 6.
  • the first speaker unit 4 is fixed to and supported by the speaker fixing portion 7 and the housing 6 via the buffer material 8.
  • control speakers used to improve the sound field and sound quality are premised on the absence of vibration radiated sound due to their own vibration, and air propagation consisting of direct sound and reflected diffraction sound that propagates in space. Only sound is used as an additional sound source. Therefore, in the present embodiment, the speaker fixing unit 7 to which the second speaker unit 5 for control is fixed prevents the vibration of the second speaker unit 5 from being transmitted to the housing 6 and the first speaker unit 4. Further, the housing 6 and the first speaker unit 4 are coupled to each other through a buffer material 8.
  • the buffer material 8 is provided also between the speaker fixing
  • the buffer material 8 may be supported and fixed. As described below, the sound pressure can be reduced by the control sound from the second speaker unit 5 such as a case vibration sound caused by the vibration of the first speaker unit 4. Because.
  • the housing 6 shown in FIG. 2A is formed so as to cover the first and second speaker units 5, and a tension adjusting unit is provided at a position facing the speaker diaphragm 1 of the first and second speaker units 5.
  • 9 is fixed to the housing 6.
  • the internal space of the housing 6 is determined by the housing 6 and the tension adjusting unit 9.
  • the tension adjusting unit 9 is located at a position facing the speaker diaphragm 1 of the first speaker unit 4 and has a substantially rectangular opening near the front surface of the thin display device 10.
  • 10 is provided. Sound waves radiated from the first and second speaker units 4 and 5 are guided to the outside of the housing 6 through the opening 10 as indicated by arrows in FIG. 2C.
  • the space between the speaker vibration surface and the tension adjustment unit 9 is adjusted by adjusting the distance between the speaker vibration surface (that is, the speaker diaphragm 1) and the tension adjustment unit 9 and the position of the opening 10. Therefore, the system resonance frequency can be easily changed at the design stage.
  • the tension adjusting unit 9 is formed of a material such as ABS resin, vinyl chloride, polycarbonate, urethane rubber, for example.
  • the shape of the opening 10 is not limited to a rectangular shape, and may be a slit shape, an elliptical shape, or the like.
  • the sound sources of the first and second speaker units 4, 5 When the first and second speaker units 4, 5 are arranged in parallel along the longitudinal direction of the speaker diaphragm 1, as shown in FIG. 3, the sound sources of the first and second speaker units 4, 5 The distance d between the centers 15 and 16 is 15 cm or more. As a result, interference unevenness occurs in places other than the front surfaces of the first and second speaker units 4 and 5. More specifically, when the first and second speaker units 4 and 5 are simply arranged in parallel, the synthesized sound wave from the two speaker units 4 and 5 is radiated as one point, line or surface radiation. Accordingly, the spatial sound pressure interference accuracy between the two, which is a necessary condition for improving the sound quality, is uneven, and the control area by the control sound from the second speaker unit 5 is narrowed.
  • the sound source center of each speaker unit is as shown in FIG. It is substantially equivalent to the center 18 of the diaphragm 1).
  • the opening 10 is provided in the tension adjusting unit 9 used for adjusting the system resonance frequency of the speaker, so that the first and second speaker units 4, 5 is emitted from the virtual sound source center 17 in the opening 10 toward the outside of the housing 6.
  • the radiation characteristic of the synthesized sound of the first and second speaker units 4 and 5 can be improved to one line, point, and surface radiation.
  • the opening 10 is disposed at a position facing the first speaker unit 4, the sound emitted from the first speaker unit 4 for sound reproduction is not reduced in sound pressure, and the outside of the housing 6.
  • the radiated sound from the second speaker unit 5 is not only reduced in sound pressure but also reflected sound.
  • the diffracted sound is also strongly superimposed.
  • the radiated sound from the second speaker unit 5 can be effectively used as a control sound wave as described above. As a result, the controlled synthetic sound wave radiated from the opening 10 becomes an acoustic wave with good sound quality.
  • the first and second speaker units 4 and 5 are not limited to the same speaker unit as shown in FIG. 2A, and may have similar sound reproduction characteristics, for example, frequency characteristics. Speaker units having different configurations may be used.
  • the radiation equivalent to the radiation characteristic of the single speaker unit is emitted.
  • a method of determining the longitudinal width of the opening 10 and the position of the opening 10 will be described so that the characteristics can be maintained.
  • the radiated sound (corresponding to unnecessary sound) generated from the first sound source 51 is generated by generating a control sound having a phase opposite to that of the radiated sound from the second sound source 52.
  • the sound pressure level SPL sound pressure level
  • the sound pressure level at the listening point 50 is generated by the amplitude q1 of the radiated sound generated by the first sound source 51 and the second sound source 52 as shown in the following formula 1. It is represented by the amplitude q2 of the control sound wave, the distance L between the first sound source 51 and the listening point 50, the distance L + ⁇ r between the second sound source 52 and the listening point 50, and the wave number k of the sound wave.
  • P1 represents the sound pressure of the radiated sound at the listening point 50
  • P2 represents the sound pressure of the control sound at the listening point 50
  • ⁇ 1 represents the phase of the radiated sound
  • j represents an imaginary number.
  • ⁇ r indicates the difference between the distance between the second sound source 52 and the listening point 50 and the distance between the first sound source 51 and the listening point 50.
  • FIG. 7 shows the sound pressure level SPL calculated from Equation 1 as a function of the amplitude ratio of the sound waves from the first and second sound sources 51 and 52.
  • FIG. 7 confirms that the sound pressure level SPL decreases as the amplitude ratio (q2 / q1) approaches 1, and that the sound pressure level SPL decreases as the path difference ⁇ r decreases.
  • the graph of FIG. 7 shows the calculation result when the frequency is 125 Hz, but the sound pressure level SPL shows the same tendency even if the frequency is changed.
  • the amplitude of the radiated sound and the control sound is adjusted to be the same, and the listening point 50 It is desirable to arrange the first and second sound sources 51 and 52 so as to be equidistant.
  • FIG. 8 shows an example in which the speakers 54 and 55 are arranged toward the front surface of the thin display device 53.
  • the path difference ⁇ r does not approach zero, the sound pressure reduction effect by the control sound from the second sound source 52 is reduced at the viewing position 50.
  • Such a decrease in the sound pressure reduction effect becomes more significant as the frequency increases.
  • the first and second speaker units 4 and 5 (corresponding to the first and second sound sources 51 and 52, respectively) are provided in the housing 6, and the first and second speakers are provided.
  • the synthesized sound waves of the units 4 and 5 are radiated to the outside of the housing 6 through the opening 10 that opens through the housing 6. In this case, even if the distance d between the sound source centers of the first and second speaker units 4 and 5 is increased, the same radiation characteristics as when only a single speaker is provided are maintained. However, when the width D in the longitudinal direction of the opening 10 is equal to or exceeds the width of the first and second speaker units 4 and 5, such radiation characteristics cannot be maintained.
  • the width D in the longitudinal direction of the opening 10 is defined by the frequency f and the sound speed c of the unnecessary sound to be controlled as shown in the following formula 2.
  • the frequency f of the unwanted sound to be controlled is 10 kHz or less
  • the longitudinal direction of the opening 10 The width D is less than 1.7 cm.
  • the sound speed c is set to 340 m / s.
  • FIG. 9 shows an arrangement of each component of the sound reproducing device on a plane including the sound source centers of the first and second speaker units 4 and 5.
  • the width of the housing 6 in which the first and second speaker units 4 and 5 are stored is L (m), and the first sound source center and the housing of the first speaker unit 4 are accommodated.
  • the distance from the body 6 is r1 (m)
  • the distance between the second sound source center of the second speaker unit 5 and the housing 6 is r2 (m)
  • the distance between the first and second sound source centers is d ( m).
  • the distances from the perpendicular to the straight line passing through the center of the opening 10 and connecting the first and second sound source centers to the sound source centers of the first and second speaker units 4 and 5 are d1 (m) and d2 ( m). Furthermore, the width in the longitudinal direction of the opening 10 is D, and the distances from both ends of the opening 10 to the housing 6 are L1 (m) and L2 (m), respectively.
  • the distance here refers to the distance along the longitudinal direction of the speaker diaphragm 1.
  • the synthesized sound of the sounds output from the two speaker units 4 and 5 in the housing 6 can be A virtual sound source center can be realized at the center. Furthermore, since the unnecessary sound can be reduced in interference at the opening 10, unnecessary sound radiated to the viewing position via the opening 10 can be reduced.
  • the sound reproduction speaker unit 4 and the control speaker unit 5 are arranged in parallel in the housing 6, and the sound reproduction speaker unit 4 and the control are provided.
  • the synthesized sound wave from the speaker unit 5 is radiated to the outside of the housing 6 through the opening 10.
  • the controlled synthesized sound wave radiated through the opening 10 has a radiation characteristic equivalent to that of a single speaker unit, and unnecessary sounds other than the original sound generated from the sound reproducing speaker unit 4 are reduced. ing. Therefore, in the sound reproducing device of the present embodiment, the sound quality can be improved even when mounted in the thin housing 6.
  • FIG. 11 shows the appearance of the thin display device 30 including the sound reproducing device according to the second embodiment.
  • a sound emitting opening 10 is provided on the front surface of the housing 21.
  • FIG. 12 is a side sectional view showing a schematic configuration of the sound reproducing device according to the second embodiment.
  • the first and second speaker units 4 and 5 are arranged vertically in the housing 6 so as to face each other as shown in FIG.
  • the first and second speaker units 4 and 5 are fixed to the housing 6 via buffer materials 8 respectively.
  • the speaker support portion 2 is fixed to the speaker fixing portion 7, and the speaker fixing portion 7 is fixed to the housing 6 through the buffer material 8.
  • Such a configuration in which the first and second speaker units 4 and 5 are arranged vertically is possible when a certain amount of volume is secured in the housing 6.
  • the first and second speaker units 4 and 5 are elliptical speakers, and the longitudinal direction of the speaker diaphragm 1 of the first and second speaker units 4 and 5 in FIG. Corresponds to the direction perpendicular to the page.
  • the opening 10 is formed on the front surface of the housing 6 at a position facing the space between the first and second speaker units 4 and 5.
  • the opening 10 is formed in a substantially rectangular shape that is elongated along the longitudinal direction of the speaker diaphragm 1, and the width in the longitudinal direction is determined so as to satisfy Formula 2.
  • the synthesized sound whose sound quality is improved is obtained by a single speaker.
  • An acoustic characteristic equivalent to the acoustic characteristic can be provided.
  • a tension adjusting unit 9 is provided with the first and second speaker units 4, 5 so as to guide sound waves radiated from the first and second speaker units 4, 5 to the opening 10. It is arrange
  • the distance between the sound source centers of the first and second speaker units 4 and 5 becomes shorter.
  • the distances from the sound source centers of the first and second speaker units 4 and 5 to the center of the opening 10 are equal. Therefore, components other than the original sound generated from the first speaker unit 4 can be greatly reduced, and the sound quality of the sound radiated from the opening 10 can be improved.
  • the first speaker unit 4 is disposed above the second speaker unit 5, the first speaker unit 4 is provided downward, and the second speaker unit 5 is provided upward.
  • the present invention is not limited to this, and the arrangement of the first and second speaker units 4 and 5 may be interchanged.
  • FIGS. 13A to 13D With reference to FIGS. 13A to 13D, the sound reproducing device according to the third embodiment will be described. 13A to 13D, the same reference numerals as those shown in FIGS. 2A to 2D are attached to the same portions and the same portions, and the description thereof is omitted.
  • the third embodiment is applied to a thin display device 30 in which an opening 10 for sound emission is provided on the front surface of a housing 21 as shown in FIG.
  • FIG. 13A shows a schematic configuration of the sound reproducing device according to the third embodiment.
  • 13B is a cross-sectional view taken along the line III-III
  • FIG. 13C is a cross-sectional view taken along the line IV-IV
  • FIG. 13D is a front view showing the appearance of the sound reproducing device.
  • the first and second speaker units 4 and 5 are arranged in the same manner as in the first embodiment.
  • the first and second speaker units 4 and 5 are covered with the housing 6 as shown in FIGS. 13A to 13D, and the first and second speaker units 4 are covered.
  • the opening 10 for radiating sound waves from the outside of the housing 6 to the outside of the housing 6 is the front surface of the housing 6 and the first speaker unit 4 side below the first and second speaker units 4 and 5. Is provided.
  • the conduit portion 11 that is a part of the housing 6 positioned below the speaker diaphragm 1 functions as a conduit for guiding sound waves radiated from the first and second speaker units 4 and 5 to the opening 10. .
  • the third embodiment has the same advantages as those of the first embodiment. Further, since the opening 10 is provided in the front surface of the housing 6, the first and second speaker units 4, 5 are provided. It is possible to prevent the synthesized sound from the sound pressure from being lowered before reaching the viewing position.
  • a sound absorbing material 13 may be provided in the space defined by the first and second speaker units 4 and 5 and the conduit portion 11, a sound absorbing material 13 may be provided as shown in FIG. 14A. Further, as shown in FIG. 14B, the speaker diaphragms of the first and second speaker units 4, 5 so that the radiated sound from the first and second speaker units 4, 5 is guided to the opening 10.
  • the conduit portion 14 may be formed to be inclined with respect to 1. In these cases, resonance in the space defined by the conduit portion 11 and the first and second speaker units can be suppressed.
  • FIG. 15 is a side sectional view showing a schematic configuration of the sound reproducing device according to the fourth embodiment.
  • the second speaker unit 5 is arranged in series behind the first speaker unit 4 in the housing 6.
  • the second speaker unit 5 for control is fixed to the housing 6 by connecting the speaker fixing portion 7 and the housing 6 via the cushioning material 8, whereas the first speaker unit 5 for sound reproduction is used.
  • the speaker unit 4 is supported and fixed to the casing 6 by connecting the speaker fixing section 7 and the casing 6 by the speaker support section 12 so as not to block sound waves from the second speaker unit 5.
  • FIG. 16 is a cross-sectional view showing a schematic configuration of the sound reproducing device according to the fifth embodiment
  • FIG. 17 is a plan view of the speaker unit as viewed from the front.
  • the first and second speaker units 4 and 5 are provided sideways so as to radiate sound waves toward the front surface of the housing 6, and the short side of the elliptical speaker diaphragm 1. It is arranged up and down along the direction.
  • the first and second speaker units 4, 5 are fixed to the housing 6 by the speaker fixing portion 7, and the first and second speaker units 4, 5 are interposed between the speaker fixing portion 7 and the housing 6.
  • a buffer material 8 is provided for suppressing the transmission of the vibration.
  • the speaker fixing part 7 to which the first speaker unit 4 is fixed and the speaker fixing part 7 to which the second speaker unit 5 is fixed are connected via a buffer material 8.
  • the opening 10 for radiating the synthesized sound waves from the first and second speaker units 4 and 5 is provided on the front surface of the housing 6 at a position facing the first speaker unit 4.
  • the control sound wave from the second speaker unit 5 is guided to the opening 10 by the conduit portion 11 and can interfere with the sound wave from the first speaker unit 4 to reduce unnecessary sound.
  • each of the speaker units 4 and 5 has a unit structure that is actually employed in many thin display devices as shown in FIG.
  • Each speaker unit 4, 5 includes a speaker diaphragm 1, a support portion 2 that supports the speaker diaphragm 1, and a voice coil 3, and as shown in FIG. 17, a speaker fixing portion that faces the speaker diaphragm 1. 7 is provided, and a speaker opening 27 and a tension adjusting unit 26 are provided at a position of the speaker fixing unit 7 facing the speaker diaphragm 1.
  • Each speaker unit 4, 5 includes a buffer material 8 that prevents vibration propagation to the housing 6.
  • the first and second speaker units 4 and 5 are both fixed to the housing 6 via the cushioning material 8, each speaker unit 4 and 5 Vibration propagating to the housing 6 is suppressed, and housing vibration noise is reduced. Further, since the synthesized sound wave from the first and second speaker units 4 and 5 is radiated from the single opening 10 to the outside of the housing 6, the radiation characteristic equivalent to that of a single speaker is maintained. Can do.
  • FIG. 18 shows a modification of the fifth embodiment.
  • the first speaker unit 4 is provided facing the front in the housing 6, and the second speaker unit 5 is the first speaker.
  • the loudspeaker diaphragm 1 of the second loudspeaker unit 5 is directed downward, and the first loudspeaker unit 4 and the second loudspeaker unit 5 are arranged perpendicular to each other.
  • each speaker unit is fixed to the housing 6 via the buffer material 8.
  • the sound reproducing apparatus can be configured using the existing speaker unit.
  • the arrangement locations of the first and second speaker units 4 and 5 may be interchanged.
  • the first speaker unit 4 may be disposed above the second speaker unit 5.
  • the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage.
  • various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.
  • constituent elements over different embodiments may be appropriately combined.
  • the sound reproducing apparatus is used for an apparatus that requires a speaker to be installed in a small volume.
  • it can be applied to a thin display device such as a liquid crystal television or to a small speaker.

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  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

L'invention porte sur un dispositif de reproduction du son qui est pourvu d'un boîtier (6), d'une première unité de haut-parleur (4) disposée dans le boîtier (6) et qui émet une première onde sonore, d'une seconde unité de haut-parleur (5) qui présente les mêmes caractéristiques de reproduction du son que la première unité de haut-parleur (4), disposée dans le boîtier (6) et qui émet une seconde onde sonore afin de réduire la pression sonore du bruit de vibration généré par le boîtier (6) qui est amené à vibrer conjointement avec la vibration de la première unité de haut-parleur (4), d'une ouverture (10) ménagée dans le boîtier (6) afin d'émettre les première et seconde ondes sonores vers l'extérieur de celui-ci (6), et d'une unité d'ancrage (7) ancrant les première et seconde unités de haut-parleur (4, 5) sur le boîtier (6). L'ouverture (10) est conçue de façon à satisfaire à D < c/2f, où D est la largeur de la direction longitudinale, f est la fréquence du bruit de vibration sonore pour laquelle la pression sonore doit être réduite, et c est la vitesse du son.
PCT/JP2009/066969 2009-09-29 2009-09-29 Dispositif de reproduction du son Ceased WO2011039842A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/066969 WO2011039842A1 (fr) 2009-09-29 2009-09-29 Dispositif de reproduction du son

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/066969 WO2011039842A1 (fr) 2009-09-29 2009-09-29 Dispositif de reproduction du son

Publications (1)

Publication Number Publication Date
WO2011039842A1 true WO2011039842A1 (fr) 2011-04-07

Family

ID=43825699

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/066969 Ceased WO2011039842A1 (fr) 2009-09-29 2009-09-29 Dispositif de reproduction du son

Country Status (1)

Country Link
WO (1) WO2011039842A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014024516A1 (fr) * 2012-08-08 2014-02-13 Kabushiki Kaisha Toshiba Appareil électronique, procédé d'amélioration de la qualité du son et élément d'amélioration de la qualité du son
JP2014107751A (ja) * 2012-11-28 2014-06-09 Sharp Corp スピーカシステム、制御方法、プログラム、および、記録媒体
EP3133827A1 (fr) * 2015-08-18 2017-02-22 Samsung Electronics Co., Ltd. Haut-parleur
WO2017104118A1 (fr) * 2015-12-17 2017-06-22 パナソニックＩｐマネジメント株式会社 Dispositif de haut-parleur
WO2019016905A1 (fr) * 2017-07-19 2019-01-24 株式会社ソシオネクスト Dispositif de traitement acoustique et dispositif de sortie acoustique
EP4114030A1 (fr) * 2021-06-30 2023-01-04 Nintendo Co., Ltd. Dispositif électronique

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JPH01132194U (fr) * 1988-03-01 1989-09-07
JPH0833086A (ja) * 1994-07-19 1996-02-02 Biiba Kk アクティブ狭指向性スピーカ
JPH11205884A (ja) * 1998-01-07 1999-07-30 Sony Corp スピーカ装置
JP2000078683A (ja) * 1998-08-27 2000-03-14 Sony Corp スピーカ装置
JP2002543710A (ja) * 1999-04-28 2002-12-17 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ スピーカシステムを備えたハウジング
JP2004015565A (ja) * 2002-06-07 2004-01-15 Fujitsu Ten Ltd スピーカ装置
JP2005151236A (ja) * 2003-11-17 2005-06-09 Yamaha Livingtec Corp スピーカシステム
JP2008245159A (ja) * 2007-03-28 2008-10-09 Toshiba Corp 音響信号発生装置および方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01132194U (fr) * 1988-03-01 1989-09-07
JPH0833086A (ja) * 1994-07-19 1996-02-02 Biiba Kk アクティブ狭指向性スピーカ
JPH11205884A (ja) * 1998-01-07 1999-07-30 Sony Corp スピーカ装置
JP2000078683A (ja) * 1998-08-27 2000-03-14 Sony Corp スピーカ装置
JP2002543710A (ja) * 1999-04-28 2002-12-17 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ スピーカシステムを備えたハウジング
JP2004015565A (ja) * 2002-06-07 2004-01-15 Fujitsu Ten Ltd スピーカ装置
JP2005151236A (ja) * 2003-11-17 2005-06-09 Yamaha Livingtec Corp スピーカシステム
JP2008245159A (ja) * 2007-03-28 2008-10-09 Toshiba Corp 音響信号発生装置および方法

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014024516A1 (fr) * 2012-08-08 2014-02-13 Kabushiki Kaisha Toshiba Appareil électronique, procédé d'amélioration de la qualité du son et élément d'amélioration de la qualité du son
JP2014107751A (ja) * 2012-11-28 2014-06-09 Sharp Corp スピーカシステム、制御方法、プログラム、および、記録媒体
EP3133827A1 (fr) * 2015-08-18 2017-02-22 Samsung Electronics Co., Ltd. Haut-parleur
US9848259B2 (en) 2015-08-18 2017-12-19 Samsung Electronics Co., Ltd. Loudspeaker
WO2017104118A1 (fr) * 2015-12-17 2017-06-22 パナソニックＩｐマネジメント株式会社 Dispositif de haut-parleur
JPWO2017104118A1 (ja) * 2015-12-17 2018-10-04 パナソニックＩｐマネジメント株式会社 スピーカ装置
WO2019016905A1 (fr) * 2017-07-19 2019-01-24 株式会社ソシオネクスト Dispositif de traitement acoustique et dispositif de sortie acoustique
JPWO2019016905A1 (ja) * 2017-07-19 2020-05-21 株式会社ソシオネクスト 音響処理装置及び音響出力装置
EP4114030A1 (fr) * 2021-06-30 2023-01-04 Nintendo Co., Ltd. Dispositif électronique
US11743632B2 (en) 2021-06-30 2023-08-29 Nintendo Co., Ltd. Electronic device

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