CN1774140A - Inverted speaker and manufacturing method thereof - Google Patents

Abstract

A method for preparing phase-reversing type of voice box includes confirming voice box low frequency resonant point according to voice box volume and acoustic requirement, confirming phase-reversing tube length according to voice box low frequency resonant point, preparing phase-reversing tube to be any form of bending type and fixing it at internal wall of voice box. The phase-reversing voice box is also disclosed.

Description

Inverted speaker and manufacturing method thereof

technical field

The invention relates to a phase-inverted sound box, which is mainly designed for the ultra-thin sound box used for TV sets and stereos. It is suitable for the inverter tube design of LCD TV speakers, short-tube CRT TV speakers, and other thin speakers whose thickness is limited due to shape or structure requirements.

Background technique

The vented speaker is widely used in the field of audio and TV audio because of its high efficiency, low distortion, and good low-frequency response.

But at present, in domestic and foreign LCD TVs, due to shape and structural limitations, it is difficult to make speakers that conform to the acoustic structure. Disadvantages such as muddy sound. Some TVs are designed with cabinets, but due to structural limitations, the length of the inverter tube is not enough, and the resonance frequency is high, resulting in the low frequency not being enhanced but prematurely attenuated, which seriously affects the sound effect of the whole set. Its structural diagram is shown in attached drawings 1a and 1b, wherein, attached drawing 1a shows a standard phase-inverting speaker, with reasonable design, phase-inversion effect is obvious, and the low frequency is strengthened. Figure 1b shows the phase-inverting sound box due to the limitation of shape and structure, the cross-sectional area of the phase-inversion tube is too small, the phase-inversion effect cannot be achieved, and the low frequency is poor.

Contents of the invention

The object of the present invention is to overcome the shortcomings of the above-mentioned prior art, and propose a vented sound box and a design method thereof that are easy to implement and can meet the acoustic parameters.

The technical solution for achieving the above purpose: a phase-inverted speaker, including a speaker box and an inverter tube, the inverter tube is a curved inverter tube, and the curved inverter tube is fixed in the speaker box.

A method for making a vented speaker, comprising the steps of:

1) Determine the low-frequency resonance point of the speaker according to the volume and acoustic requirements of the speaker;

2) Determine the length of the inverter tube according to the low-frequency resonance point of the speaker;

3) Make the inverter tube of the specified length into a curved arbitrary shape and then fix it in the speaker box.

The curved inverted tube is a right-angled inverted tube.

The inverter tube is attached to the front wall inside the sound box.

The sound-absorbing and shock-absorbing material is coated on the front wall of the sound box for attaching the inverter tube.

The front wall part of the sound box attached to the inverter tube is used as the tube wall of the inverter tube.

By adopting the above-mentioned technical scheme, the beneficial technical effect of the present invention is: because the vented sound box needs to be designed according to the horn parameters, the low-frequency resonance point is the most important design content of the vented sound box, and the volume of the sound box and the diameter of the ported tube and The length is the three elements that determine the low-frequency resonance point of the speaker. A large number of tests by our company have proved that the shape and angle of the inverter tube will not cause adverse effects on the sound. Therefore, the present invention designs the traditional straight-type inverter tube into a curved inverter tube of any shape, thus breaking through the limitation of the thickness of the sound box, and the length of the inverter tube can be arbitrarily extended as required until it meets the requirements of The required length of the design tuning frequency for acoustic requirements. The curved inverter tube can be in any shape, for example, the traditional inverter tube can be bent at 90 degrees or made into other arcs, which can be regular or irregular arcs.

The invention effectively solves the phase-inversion design problem of the ultra-thin sound box. The design of the invention can not only maintain a beautiful appearance, but also ensure an excellent acoustic design, and has good application value.

Description of drawings

Fig. 1a is a schematic structural diagram of an existing standard vented speaker.

Fig. 1b is a structural schematic diagram of an existing vented speaker box limited by its shape and structure.

Fig. 2 is a structural schematic diagram of a phase-reversing sound box of the present invention.

Fig. 3 is a structural schematic diagram of another vented speaker of the present invention.

Fig. 4 is a structural schematic diagram of another inverted speaker of the present invention.

Fig. 5 is a structural schematic diagram of another inverter speaker according to the present invention.

Detailed ways

Embodiment 1, a kind of phase-inverted sound box and its manufacturing method, as shown in Figure 2, comprise sound box body 1 and curved phase-inverted tube 2, the bending mode of phase-inverted tube 2 is a right angle, is about to traditional phase-inverted tube according to Bend at 90 degrees, and fix the right-angled inverter tube 2 on the front wall of the sound box body 1 .

A method for making a vented speaker, comprising the steps of:

1) Determine the low-frequency resonance point of the speaker according to the volume and acoustic requirements of the speaker;

2) Determine the length of the inverter tube, L=C ² S/4π ² f _b V-0.82S ^1/2 , where: C is the speed of sound; S is the cross-sectional area of the inverter tube; f _b is the resonance frequency of the speaker system ; V is the volume of the box;

3) Fix the right-angle inverter tube 2 designed according to the requirements on the front wall of the speaker cabinet 1.

Embodiment 2, another kind of phase-inverted sound box and its manufacturing method, as shown in Figure 3, comprise sound box body 1 and curved phase-inverted tube 2, the bent-type phase-inverted tube 2 is fixed in the sound box body 1 on the front wall.

The manufacturing method of the phase-reversing sound box of this embodiment is the same as that of Embodiment 1.

Embodiment 3. Yet another phase-inverting sound box and its manufacturing method, as shown in FIG. The sound-absorbing and shock-absorbing material 3 is coated on the front wall of the sound-absorbing and shock-absorbing material 3 for attaching the inverter tube 2 to the sound-absorbing and shock-absorbing material.

The production method of the inverter speaker: 1) Determine the low-frequency resonance point of the speaker according to the volume and acoustic requirements of the speaker; 2) Determine the length of the inverter tube according to the low-frequency resonance point of the speaker; 3) The speaker before the inverter tube is attached The front wall of the cabinet is coated with sound-absorbing and shock-absorbing materials; 4) attaching the inverter tube to the front wall of the speaker cabinet.

Embodiment 4. Yet another inverter speaker and its manufacturing method, as shown in FIG. 5 , includes a speaker cabinet 1 and an inverter tube 2. The front wall in the sound box body 2 to which the phase tube 2 is attached serves as a part of the tube wall of the phase inverter tube 2 .

The manufacturing method of the phase-reversing sound box of this embodiment is the same as that of Embodiment 1.

Claims (10)

1, a kind of phase inverted cabinet comprises sound box and phase-reversing tube, and phase-reversing tube is fixed on the sound box inwall, it is characterized in that: described phase-reversing tube is the bending-type phase-reversing tube.

2, according to the described phase inverted cabinet of claim 1, it is characterized in that: described bending-type phase-reversing tube is the right-angle type phase-reversing tube.

3, according to the described phase inverted cabinet of claim 1, it is characterized in that: described phase-reversing tube is installed on the interior antetheca of audio amplifier.

4, according to the described phase inverted cabinet of claim 1, it is characterized in that: described phase-reversing tube is attached on the interior antetheca of audio amplifier.

5, according to the described phase inverted cabinet of claim 4, it is characterized in that: be coated with the sound-absorbing vibration-absorptive material on the described antetheca that is used to attach phase-reversing tube.

6, according to the described phase inverted cabinet of claim 1, it is characterized in that: the front wall section in the audio amplifier that described and phase-reversing tube attach mutually is as the tube wall of phase-reversing tube.

7, a kind of manufacture method of phase inverted cabinet comprises the steps:

1) according to the volume and the acoustics requirement of audio amplifier, determines audio amplifier low-frequency resonant point;

2) determine the length of phase-reversing tube according to audio amplifier low-frequency resonant point;

3) be fixed in the sound box again after the phase-reversing tube of specific length being made into the arbitrary shape of bending-type.

8, according to the manufacture method of the described phase inverted cabinet of claim 7, it is characterized in that: described bending-type is a right-angle type.

9, according to the manufacture method of the described phase inverted cabinet of claim 7, it is characterized in that: in the time of on the antetheca in phase-reversing tube is attached at audio amplifier, on the antetheca that attaches phase-reversing tube, apply the sound-absorbing vibration-absorptive material.

10, according to the manufacture method of the described phase inverted cabinet of claim 7, it is characterized in that: will with front wall section in the audio amplifier that phase-reversing tube attaches mutually tube wall as phase-reversing tube.

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