WO2010134652A1 - Resonance tube structure for multi-channel headphone - Google Patents

Abstract

The present invention relates to a resonance tube structure for a multi-channel headphone, which resonates the sounds reproduced from front, rear, and center speakers that are included in the multi-channel headphone, and introduces the reproduced sounds to the ears of a listener. The resonance tube structure for a multi-channel headphone comprises: a cylindrical tubular front resonance tube which is connected to the front speaker, and transmits the sound that is reproduced through a front chamber formed therein to the ears of the listener; and a tubular rear resonance tube of which one end is connected to the rear speaker and the other end is connected to the front chamber of the front resonance tube to resonate the sound reproduced from the rear speaker and introduces the resonated sound to the front chamber, wherein the rear resonance tube is provided with a rear chamber having an expanded cross-sectional area on the section that is connected to the rear speaker so that the rear resonance tube has a horn shape; and a tubular center resonance tube of which one end is connected to the center speaker and the other end is connected to the front chamber of the front resonance tube to resonate the sound reproduced from the center speaker and introduce the resonated sound to the front chamber. This resonance tube structure for a multi-channel headphone enables reproduction of natural and clear sounds because the time difference generated from the sound space can be artificially formed and thus the ideal time difference is generated in a sound field, and also enables production of the sound field without need of any additional part, thereby simplifying a system.

Description

[Revision 10.09.2009 by Rule 26] 26 Resonance Tube Structure for Multichannel Headphones

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resonator tube structure for multichannel headphones, and more particularly, to a resonator tube structure for multichannel headphones that enables natural and clear reproduction of three-dimensional stereophonic sound by artificially generated sound parallax.

The audio speaker system has rapidly developed from the initial stereo two channels to multichannels such as 5.1 channel, 6.1 channel, and 7.1 channel. As an example of multi-channel, the 5.1-channel system uses the center (C), front left (FL), and front right (FR) to three-dimensionally reproduce sound signals output from sound equipment (home theaters, DVD players, PCs, game machines, etc.). ), Rear left (RL), rear right (RR) speaker and woofer (W). Here, a woofer is a bass-only player, which is referred to as a 5.1-channel system because it has no directivity and is regarded as 0.1 channel.

Recently, multi-channels have appeared in the headphone of the listener, not the speaker system.

Figure 1 is disclosed in the Republic of Korea Utility Model Registration (Registration No .: 20-0319789), a wiring diagram showing a conventional 5.1-channel headphone system is shown.

As shown, the conventional 5.1-channel headphone system outputs a 5.1-channel signal including signals of the center (C), front left (FL), front right (FR), rear left (RL), and rear right (RR). The right unit including a right front unit, a right middle unit, a right rear unit, and a right vibration unit for reproducing a signal of each channel output from the sound device 60, and a left front unit A headphone 50 composed of a left unit including a left middle unit, a left rear unit, and a left vibration unit; and a headphone unit positioned between the sound device 60 and the headphone 50 to output each channel signal output from the sound device. It is provided with a relay means 70 for transmitting to each unit of the regeneration.

However, in the conventional 5.1-channel headphone system as described above, since the units for sound reproduction are all located adjacent to the ear, there is almost no parallax in which the sound reaches the ear, so that the acoustic separation function is larger than that of a speaker system installed in a large space. The sound is remarkably dropped, and the sound that is reproduced eventually has a flat feeling lacking a three-dimensional effect.

More specifically, there are two human ears, which are about 20cm apart from each other. Thus, when the sound comes from the front left side, the sound reaching both ears is time lag and its volume is slightly different. The face acts as an obstacle between the pronunciation body and the right ear, which causes the sound of the right ear to be smaller than the sound of the left ear. On the other hand, sounds with low frequency easily diffract obstacles, but sounds with high frequency are difficult to diffract obstacles because of their straightness. Therefore, the sound of the right ear is already attenuated higher than the sound of the left ear. In other words, there are time differences, volume differences, and tone differences in the sounds heard by both ears, and the human brain processes the data to find the direction. For this reason, putting the speakers in one headphone at the same time eliminates the sense of distance.

In order to solve the above problems, the Republic of Korea Registered Utility Model Publication (Registration No .: 20-0319770), a multi-channel headphone system for delaying, attenuating and mixing the input sound signal as shown in FIG. It is starting.

Referring to the drawings, the conventional multichannel headphone system as described above includes a multichannel headphone 20 including a front unit and a rear unit and a correction means 30.

Here, the correction means 30, the first delay element (32a, 32b) for delaying each sound signal input to the front unit, and the sound input to the outer unit by attenuating a part of each sound signal input to the right unit A first signal attenuator / mixer 34 mixing to the signal, and a second signal attenuator / mixer 34 'attenuating a portion of each sound signal input to the left unit and mixing the sound signal input to the right unit. do.

Although not illustrated, the first and second signal attenuators / mixers 34 and 34 'delay the respective sound signals inputted to the first and second signal attenuators / mixers 34 and 34' by a predetermined time. And a second delay element for inputting to the left unit or the right unit.

Therefore, according to the conventional multi-channel headphone system as described above, by compensating the volume that the left and right ears can feel in order to match the actual sound environment, and artificially create the time difference between the headphones, even with headphones, You can feel a sense of presence.

However, even in the conventional multi-channel headphone system as described above, since the units for sound reproduction are located adjacent to the ear, each band having the same amount of energy interferes and a masking phenomenon occurs that causes the sound to disappear. This is difficult, and even reproduction of each band is impossible.

In addition, due to the role of the auricle in the actual sound space, sounds coming from the same phonetic body sound remarkably differently in front and behind, and this difference plays a decisive role in making the front and rear feel. By the way, the conventional multi-channel headphone system compensates the volume that the left and right ears can feel and artificially makes the time difference, but does not consider the time difference and the volume of the sound felt by the listener's ear along the front and rear directions. It does not have the limit.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a resonance tube structure for multi-channel headphones that can naturally and clearly reproduce three-dimensional stereophonic sound by artificially produced sound parallax.

Resonance tube structure for a multi-channel headphone of the present invention for achieving the above object, by resonating the front, rear and center speaker reproduced sound provided in the multi-channel headphone to the listener's ear, is connected to the front speaker A cylindrical tubular front resonator tube for transmitting the sound reproduced through the front chamber formed therein toward the listener's ear; A tubular rear resonator tube having one end connected to the rear speaker and the other end communicating with the front chamber of the front resonance tube to resonate the sound reproduced from the rear speaker to guide the front chamber to the front chamber; And a tubular center resonance tube having one end connected to the center speaker and the other end communicating with the front chamber of the front resonance tube and resonating the sound reproduced from the center speaker to the front chamber, wherein the rear resonance tube is the It characterized in that the shape of the Horn (Horn) by forming a rear chamber having an extended cross-sectional area at the end connected to the rear speaker.

Here, the center resonator tube is preferably in the shape of a horn (Horn) by forming a center chamber having an extended cross-sectional area at the end connected to the center speaker.

In addition, the length of the rear resonance tube is preferably longer than the length of the center resonance tube.

Further, based on the circumferential direction of the front resonance tube, the end of the rear resonance tube communicating with the front chamber is preferably arranged so as to be out of phase with the end of the center resonance tube communicating with the front chamber.

According to the resonance tube structure for multichannel headphones according to the present invention, the following effects are obtained.

First, by adopting the resonance tube structure that artificially makes the time difference occurring in the sound space, it is possible to generate the time difference of the ideal sound field, so that natural and clear sound can be reproduced.

Second, by adopting the indirect sound reproduction method through the resonance tube instead of the direct sound, it has an effect of preventing hearing loss.

Third, even if there is no unit corresponding to the woofer, by having a horn-like chamber such as a resonance tube of a wind instrument at the rear and the end of the center resonance tube connected to the speaker, the self-resonance is possible, so that natural low range sound reproduction is possible. .

Fourth, according to the adjustment and optimization of the resonance tube length, it is possible to naturally produce artificial space and sound delay.

Fifth, the sound field can be produced without additional configuration, which can simplify the system.

1 and 2 are wiring diagrams showing a conventional multi-channel headphone system,

3 is a perspective view showing a multi-channel headphone with a resonance tube structure according to an embodiment of the present invention,

4 is a front view of the headphones shown in FIG. 3;

5 is a partial cross-sectional perspective view seen from the "X" direction of FIG.

FIG. 6 is a partial cross-sectional perspective view seen from the “Y” direction of FIG. 3;

7 is a conceptual diagram for explaining the operation of the resonance tube structure shown in FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

3 is a perspective view showing a resonator tube structure provided in a multi-channel headphone system according to an embodiment of the present invention, FIG. 4 is a front view of the headphone shown in FIG. 3, FIG. 5 is a partial cross-sectional perspective view seen from the "X" direction of FIG. FIG. 6 is a partial cross-sectional perspective view seen from the direction “Y” of FIG. 3, and FIG. 7 is a conceptual view for explaining the operation of the headphones shown in FIG. 3.

First, as shown in FIGS. 3 and 4, the resonance tube structure for the multi-channel headphones according to the embodiment of the present invention is included in each of the pair of headphones 100 disposed at each of both ears of the listener, A front resonance tube 112, a rear resonance tube 122, and a center resonance tube 132 are provided. The front, rear and center resonance tubes 112, 122, 132 are provided in the front, rear and center units 110, 120, 130, respectively. Meanwhile, in the drawing, one headphone 100 is shown disposed in the left ear of the listener for convenience. However, since the headphones arranged in the listener's right ear have the same configuration as the headphones 100 arranged in the left ear, repeated description thereof will be omitted here.

The front resonance tube 112, one end is connected to the front speaker 111 and forms a front chamber 113 therein. The front resonance tube 112 has a cylindrical tube shape. The sound reproduced by the front speaker 111 is transmitted to the listener's ear through the front chamber 112.

As shown in FIG. 5, one end 122a of the rear resonance tube 122 is connected to the rear speaker 121 and the other end 122b communicates with the front chamber 113 of the front resonance tube 112. The rear resonance tube 122 resonates the sound reproduced from the rear speaker 121 to guide the front chamber 113. In this case, the rear resonance tube 122 forms a rear chamber 123 having an extended cross-sectional area at the end 122a connected to the rear speaker 121 to form a horn shape such as a resonance tube of a wind instrument.

The center resonance tube 132 included in the center unit 130 has one end 132a connected to the center speaker 131 and the other end 132b communicating with the front chamber 113 of the front resonance tube 112. The center resonance tube 132 resonates the sound reproduced from the center speaker 131 to guide the front chamber 113. In addition, the center resonance tube 132 also has a shape of a horn by forming a center chamber 133 having an extended cross-sectional area at the end 132a connected to the center speaker 131 similar to the rear resonance tube 122. To achieve.

On the other hand, in order to correct the time difference and volume of the sound felt by the listener's ears along the front and rear direction, the length of the rear resonance tube 122 has a structure longer than the length of the center resonance tube 132. . However, the actual length of the tube can be designed to form a time difference by adjusting to the characteristics of the sound, the sound is properly diffracted to feel a three-dimensional feeling.

In addition, the end 122b of the rear resonance tube 122 communicating with the front chamber 113 is a center resonance tube communicating with the front chamber 113 when viewed based on the circumferential direction of the front resonance tube 112 ( It is preferable that the phase is arranged to be out of phase with the end portion 132b of the 132. In this way, by inserting the phases of the rear resonance tube 122 and the center resonance tube 132 so as not to interfere with each other, the vibration energy pressures synergize with each other to cause a vortex-type resonance, thereby providing a natural sound pressure. Can be increased.

On the other hand, the reference numeral 140, which is not described, indicates a partition plate installed on the outer wall of the front resonance tube 113 to divide the front resonance tube 113 back and forth.

Hereinafter, the operation of the tube structure for multichannel headphones as described above will be described with reference to the accompanying drawings.

3 to 7, when the front speaker 111 receives an audio signal corresponding to the front from a sound device connected by a plug or a jack and plays the sound signal, the reproduced sound has a multi-dome structure. It moves to the listener's ear through the front chamber 113 formed in the cylindrical tubular front resonance tube (112).

When the rear speaker 121 receives and reproduces an acoustic signal corresponding to the rear, the reproduced sound is resonated through the rear resonance tube 122 and guided to the front chamber 113. Here, a portion of the rear chamber 123 having a cross-sectional area extended to the end 122a connected to the rear speaker 121 among the both ends 122a and 122b of the rear resonator tube 122 is a horn such as a resonance tube of a wind instrument. ) To form the shape. In other words, having a reverse phase structure of a jar-shaped Helmholtz resonator exhibiting high sound absorption at low frequencies enables natural low range generation by self resonance even without a unit corresponding to a woofer.

In addition, when the center speaker 111 receives and reproduces an acoustic signal corresponding to the center, the reproduced sound is resonated through the center resonance tube 132 and guided to the front chamber 113. Here, the rear chamber 133 portion having an extended cross-sectional area at the end 132a connected to the rear speaker 131 among the both ends 132a and 132b of the center resonator tube 132 has a horn shape. As a result, natural low range generation by self resonance is possible.

On the other hand, the end 122b of the rear resonance tube 122 communicating with the front chamber 113 and the end 132b of the center resonance tube 132 communicating with the front chamber 113 are the circumference of the front resonance tube 112. Based on the direction, the phases are arranged so that they do not interfere with each other, and the pressures of the vibration energy synergize with each other to cause a vortex type resonance, thereby increasing the natural sound pressure.

In this way, the sound of the rear and center diffracted through the end 122b of the rear resonance tube 122 and the end 132b of the center resonance tube 132 is combined with the sound of the front to obtain a rich volume and a natural sound field. You can feel the sense of space like a music hall.

In addition, by employing the structure of the resonance tube (112, 122, 132) different in length, by artificially creating a time difference occurring in the sound space, it is possible to generate a time difference of the ideal sound field, thereby reproducing a natural and clear sound.

Moreover, by adopting the indirect sound reproduction method through the resonance tube instead of the direct sound, it has an effect of preventing hearing loss. In addition, according to the adjustment and optimization of the resonance tube length, the artificial space can be naturally produced and the sound delay can occur naturally. And since the sound field can be produced without additional configuration, the system can be simplified.

On the other hand, in the embodiment of the present invention described above based on the 5.1-channel headphone of the multi-channel headphone, the concept of the present invention that employs a resonance tube structure to artificially create the time difference is a six-channel, seven-channel headphone Applicable to multi-channel headphones such as will be apparent.

Claims (4)

In the resonator tube structure for the multi-channel headphones to resonate the sound reproduced from the front, rear and center speakers provided in the multi-channel headphones to the listener's ear, A cylindrical tubular front resonance tube connected to the front speaker and transmitting the sound reproduced through the front chamber formed therein toward the listener's ear; A tubular rear resonator tube having one end connected to the rear speaker and the other end communicating with the front chamber of the front resonance tube to resonate the sound reproduced from the rear speaker to guide the front chamber to the front chamber; And One end is connected to the center speaker and the other end is in communication with the front chamber of the front resonance tube is provided with a tubular center resonance tube to resonate the sound reproduced from the center speaker to the front chamber, The rear resonance tube is a resonance tube structure for multi-channel headphones, characterized in that the shape of the horn (Horn) by forming a rear chamber having an extended cross-sectional area at the end connected to the rear speaker. The method of claim 1, wherein the center resonance tube, Resonance tube structure for multi-channel headphones, characterized in that the shape of the horn (Horn) by forming a center chamber having an extended cross-sectional area at the end connected to the center speaker. The method of claim 1, And the length of the rear resonance tube is longer than that of the center resonance tube. The method according to any one of claims 1 to 3, On the basis of the circumferential direction of the front resonance tube, the end of the rear resonance tube communicating with the front chamber is arranged so that the phase is different from the end of the center resonance tube communicating with the front chamber Resonance tube structure.

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