CN202818568U - Sound conduction device and audio video equipment adopting the same - Google Patents
Sound conduction device and audio video equipment adopting the same Download PDFInfo
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- CN202818568U CN202818568U CN201220458819.9U CN201220458819U CN202818568U CN 202818568 U CN202818568 U CN 202818568U CN 201220458819 U CN201220458819 U CN 201220458819U CN 202818568 U CN202818568 U CN 202818568U
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- back cavity
- guide device
- voice guide
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- chamber
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Abstract
The utility model relates to a sound conduction device, comprising: a front cavity with two opened ends; a rear cavity, wherein one end of the rear cavity is connected with one end of the front cavity, the other end of the rear cavity is sealed; a loudspeaker arranged at a connecting position between the front cavity and the rear cavity; and a sound-absorbing cotton arranged in the rear cavity. According to the sound conduction device and audio video equipment adopting the sound conduction device provided by the utility model, the front cavity is connected with the rear cavity, the loudspeaker is arranged at the connecting position between the front cavity and the rear cavity, and the sound-absorbing cotton is arranged in the rear cavity, thus distortion of an audio signal is reduced, a low frequency effect is increased, and a high frequency effect is also increased in the front cavity; compared with the way of only adopting the loudspeaker to output the sound, timbre of the outputted sound is greatly improved; in addition, the sound conduction device and the audio video equipment of the utility model have the advantages of simple structure and low cost.
Description
Technical field
The utility model relates to the audio and video equipment field, particularly relates to the audio and video equipment of a kind of voice guide device and this voice guide device of employing.
Background technology
Audio and video equipment can bring the enjoyment of people's vision and the sense of hearing as the equipment that the data in the storage medium can be play, is subject to liking of people.
Traditional audio and video equipment, such as DVD(Digital Versatile Disc, digital versatile disc) player, when playing audio-video data, audio signal is directly exported by loud speaker, because loud speaker is single to the processing of sound, the easy distortion of audio signal causes the tonequality of sound of output relatively poor.
The utility model content
Based on this, be necessary to cause the relatively poor problem of output tonequality for the easy distortion of audio signal of traditional audio and video equipment output, a kind of voice guide device is provided.
In addition, also be necessary to provide a kind of audio and video equipment that adopts above-mentioned voice guide device.
A kind of voice guide device is characterized in that, comprising:
The ante-chamber of both ends open;
Back cavity, an end of described back cavity links to each other with an end of described ante-chamber, the other end sealing of described back cavity;
Loud speaker is positioned at described ante-chamber and back cavity junction;
Be positioned at the acoustical cotton of described back cavity.
Therein among embodiment, the cross section away from an end of described back cavity of described ante-chamber is rectangular.
Among embodiment, described loud speaker is positioned at described back cavity therein, and near described ante-chamber.
Among embodiment, described loud speaker is circular membrane therein, and described back cavity is cylindric.
Therein among embodiment, the diameter of described back cavity and the equal diameters of described circular membrane.
Among embodiment, the diameter of described circular membrane is 30 millimeters therein, and the diameter of described back cavity is 30 millimeters, and the length of described back cavity is 100 millimeters.
Among embodiment, described acoustical cotton is glass fibre therein.
Among embodiment, described loud speaker is polygon at the cross sectional shape perpendicular to voice guide device axis direction therein, and described back cavity is that polygon is prismatic.
A kind of audio and video equipment comprises face-piece and is arranged on phonate hole on the face-piece, also comprises above-mentioned voice guide device, the ante-chamber of described voice guide device away from an end of described back cavity near and facing to described phonate hole.
The audio and video equipment of above-mentioned voice guide device and this voice guide device of employing, adopt ante-chamber to link to each other with back cavity, loud speaker is arranged on the junction of ante-chamber and back cavity, and places acoustical cotton in back cavity, reduces the audio signal distortion, increase low-frequency effect, increase high-frequency effect in the ante-chamber, and only adopt the loud speaker output sound, improved greatly the tonequality of output sound, and simple in structure, cost is lower.
Description of drawings
Fig. 1 is voice guide device perspective view of the present utility model;
Fig. 2 is the cutaway view of voice guide device among Fig. 1;
Fig. 3 is the experiment schematic diagram that back cavity is selected parameter;
Fig. 4 is the perspective view of audio and video equipment of the present utility model.
Embodiment
Be described in detail below in conjunction with specific embodiment and the accompanying drawing concrete structure to voice guide device and audio and video equipment, so that it is clearer.
Need to prove, the noun of locality that adopts in describing by reference to the accompanying drawings, up, down, left, right, before and after only is that description scheme is used, not as the restriction to concrete structure.
Fig. 1 is the perspective view of voice guide device; Fig. 2 is the cutaway view of voice guide device.Referring to Fig. 1 and Fig. 2, a kind of voice guide device 10 comprises back cavity 110, loud speaker 120, ante-chamber 1 30 and acoustical cotton (not shown).Wherein: back cavity 110 links to each other with ante-chamber 1 30, and loud speaker 120 is positioned at the junction of back cavity 110 and ante-chamber 1 30.
Acoustical cotton is positioned at back cavity 110, is used for avoiding reflecting standing wave, and prevent from shaking sound and enhancing bass reduce the distortion of sound wave.Acoustical cotton is that the material with certain sound-absorption coefficient is made.In the present embodiment, acoustical cotton is glass fibre.
One end of back cavity 110 links to each other with an end of ante-chamber 130, and the other end sealing of back cavity 110 guarantees bass effect by sealing.The volume of back cavity 110 needs greater than minimum back cavity volume threshold, because of the volume of back cavity 110 less than minimum back cavity volume threshold after, the low-frequency resonant frequency can sharply increase, and affects bass effect.The volume of back cavity 110 is larger, and the low-frequency resonant frequency is lower.
The shape of the shape of back cavity 110 and loud speaker 120 is complementary, and when loud speaker 120 was polygon in the cross section perpendicular to voice guide device axis direction, back cavity 110 was prismatic.When for example loud speaker 120 was rectangle in the cross section perpendicular to the axis direction, back cavity 110 was cuboid.
In the present embodiment, loud speaker 120 is circular membrane, and the shape of back cavity 110 is cylindric.Further, the equal diameters of the diameter of back cavity 110 and circular membrane.In the present embodiment, the circular membrane diameter is 30 millimeters, and the diameter of back cavity 110 is 30 millimeters, and length is 100 millimeters.The diameter of back cavity 110 is 30 millimeters, and length is 100 millimeters and records through experiment, when this numerical value, can obtain preferably bass effect.As shown in Figure 3, diameter is 30 millimeters, and length is called Bezier (Bessel) curve greater than 100 millimeters curve, and Bezier is linear phase filter; Diameter is 30 millimeters, and length is that 100 millimeters curve is called fertile hereby (Butterworth) curve of Bart, and the Bart is fertile to be the most straight filter of frequency response in the passband hereby; Diameter is 30 millimeters, and length is called Chebyshev (chebychev) curve less than 100 millimeters curve, and Chebyshev (chebychev) is the fastest all-pole filter of attenuation outside a channel.Hence one can see that, and the diameter that obtains is 30 millimeters, and length is that 100 millimeters curve is the most straight, and the acoustical quality that reflects is better.
Loud speaker 120 is positioned at the junction of ante-chamber 130 and back cavity 110, is respectively both situations, and the first is that loud speaker 120 is positioned at back cavity 110, and close ante-chamber 130; The second is that loud speaker 120 is positioned at ante-chamber 130, and near back cavity 110.The both ends open of ante-chamber 130, and ante-chamber 130 is rectangular away from the cross section of an end of back cavity 110.Adopt rectangle with the phonate hole of voice output to the audio and video equipment, to guarantee the larger area of speaking.
When the area one of phonate hole regularly, ante-chamber 130 volumes are less, the high-frequency cut-off resonance frequency is larger, front cavity volume too hour, loud speaker 120 is too near apart from phonate hole, cause shaking excessive so that the low-frequency sensitive degree descends.Therefore, phonate hole area S and front cavity volume V determine high-frequency cut-off frequency F jointly, and S is larger, and V is less, and high-frequency effect is better.Need according to circumstances design the volume of ante-chamber.
The perspective view of the audio and video equipment that Fig. 4 provides for the utility model.Referring to Fig. 4, audio and video equipment comprises voice guide device 10, face-piece 20 and is arranged on phonate hole 210 on the face-piece.Wherein, the ante-chamber 1 30 of voice guide device 10 away from an end of back cavity 11 0 near and facing to phonate hole 210.
The audio and video equipment of above-mentioned voice guide device and this voice guide device of employing, adopt ante-chamber 130 to link to each other with back cavity 110, loud speaker 120 is arranged on the junction of ante-chamber 130 and back cavity 110, and at back cavity 110 interior placement acoustical cottons, reduces the audio signal distortion, increase low-frequency effect, ante-chamber 130 interior increase high-frequency effect and only adopt loud speaker 120 output sounds, have improved greatly the tonequality of output sound, and simple in structure, cost is lower.
In addition, loud speaker 120 conveniently is placed on the junction of ante-chamber 1 30 and back cavity 11 0 for circular membrane.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (9)
1. a voice guide device is characterized in that, comprising:
The ante-chamber of both ends open;
Back cavity, an end of described back cavity links to each other with an end of described ante-chamber, the other end sealing of described back cavity;
Loud speaker is positioned at the junction of described ante-chamber and back cavity;
Be positioned at the acoustical cotton of described back cavity.
2. voice guide device according to claim 1 is characterized in that, described ante-chamber is rectangular away from the cross section of an end of described back cavity.
3. voice guide device according to claim 1 is characterized in that, described loud speaker is positioned at described back cavity, and near described ante-chamber.
4. voice guide device according to claim 1 is characterized in that, described loud speaker is circular membrane, and described back cavity is cylindric.
5. voice guide device according to claim 4 is characterized in that, the diameter of described back cavity and the equal diameters of described circular membrane.
6. voice guide device according to claim 5 is characterized in that, the diameter of described circular membrane is 30 millimeters, and the diameter of described back cavity is 30 millimeters, and the length of described back cavity is 100 millimeters.
7. voice guide device according to claim 1 is characterized in that, described acoustical cotton is glass fibre.
8. voice guide device according to claim 1 is characterized in that, described loud speaker is polygon at the cross sectional shape perpendicular to voice guide device axis direction, and described back cavity is that polygon is prismatic.
9. audio and video equipment comprises face-piece and is arranged on phonate hole on the face-piece, it is characterized in that, also comprise such as the described voice guide device of claim 1 to 8, the ante-chamber of described voice guide device away from an end of described back cavity near and facing to described phonate hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220458819.9U CN202818568U (en) | 2012-09-07 | 2012-09-07 | Sound conduction device and audio video equipment adopting the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220458819.9U CN202818568U (en) | 2012-09-07 | 2012-09-07 | Sound conduction device and audio video equipment adopting the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202818568U true CN202818568U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220458819.9U Expired - Fee Related CN202818568U (en) | 2012-09-07 | 2012-09-07 | Sound conduction device and audio video equipment adopting the same |
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| CN (1) | CN202818568U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104244151A (en) * | 2013-06-21 | 2014-12-24 | 鸿富锦精密工业（深圳）有限公司 | Loudspeaker |
-
2012
- 2012-09-07 CN CN201220458819.9U patent/CN202818568U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104244151A (en) * | 2013-06-21 | 2014-12-24 | 鸿富锦精密工业（深圳）有限公司 | Loudspeaker |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20210907 |