CN2270334Y - Microphone sound wave receiving enhancing apparatus - Google Patents
Microphone sound wave receiving enhancing apparatus Download PDFInfo
- Publication number
- CN2270334Y CN2270334Y CN 96223950 CN96223950U CN2270334Y CN 2270334 Y CN2270334 Y CN 2270334Y CN 96223950 CN96223950 CN 96223950 CN 96223950 U CN96223950 U CN 96223950U CN 2270334 Y CN2270334 Y CN 2270334Y
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- parabolic
- microphone
- paraboloid
- sound wave
- shell
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- Expired - Fee Related
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- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
The utility model relates to a microphone sound wave receiving enhancing apparatus, which comprises an upper paraboloid and a lower paraboloid in opposite positions, wherein, the upper paraboloid and the lower paraboloid are connected with each other by a connecting column, the focus of the upper paraboloid coincides with the focus of the lower paraboloid, the center part of the lower paraboloid is provided with a center hole, the lower side an opening of the hole is connected with a sound wave path, a microphone is arranged in a path, the outer side of the lower paraboloid is provided with a shell, and a meshy upper cap is arranged above the upper paraboloid. The enhancing apparatus can ensure a signal in departure from main sound source with a short distance to be reflected into a sound transmission path hardly to reduce noises. The utility model is very sensitive to the direction of the sound source to ensure the microphone to be more sensitive with high fidelity.
Description
The utility model relates to a kind of device that improves the microphone reception, and a kind of microphone sound wave of more specifically saying so receives intensive.
In the normally used microphone, have only a microphone, its shortcoming is to utter long and high-pitched sounds, and background noise is big.In order to overcome above-mentioned defective, designed a kind of novel microphone, article is published on the fourth phase in 1984 " international electrophile " magazine, exercise question for the microphone structure of " eliminating the microphone of on-site noise " its introduction is: microphone two ends are separated by two microphones are installed about 20cm, a signal that receives words person and background noise only wherein, with two anti-phase mixing of microphone output signal, background noise is cancelled, talker's sound is admitted to loudspeaker with can having no loss, thereby reaches the purpose of eliminating background noise.Also there is following defective in this microphone structure: if the signal that two microphones about 20cm of being separated by pick up differs 90 °, 180 ° or 270 ° etc., then not only can not abate the noise, can increase noise intensity on the contrary.In addition, because two microphones can both be picked up talker's sound, so cause the more common microphone of output amplitude little, the playback volume is little, and signal to noise ratio is low.
The purpose of this utility model provides the main sound-source signal of a kind of reinforcement, reduce time sound source disturbs, makes voice signal significantly strengthen fidelity, and to because of sound source once in a while away from or the signal of telecommunication that causes of on-mike change the microphone sound wave that automatic adjusting stabilization is arranged and receive intensive.
The purpose of this utility model can realize in the following manner: a kind of microphone sound wave receives intensive, include parabolic and following parabolic, both settle relatively, and last parabola is fixed on down paraboloidal top by joint pin, and go up parabolic and down paraboloidal focus coincidence; Plane, upper and lower parabolic opening place is through overfocus, have centre bore at following paraboloidal middle part, place, aperture downside is connected with the columnar channel of acoustic wave that is upper end open, microphone is placed in the channel of acoustic wave, be fixed with the shell of side opening in the following paraboloidal outside, in the cavity between shell and transaudient passage and following parabola charges are arranged, the opening part of shell is provided with netted loam cake.Described following paraboloidal focal length equals 1/4 of following parabolic opening diameter.Described paraboloidal focal length equals 1/4 of parabolic opening diameter.
The utility model compared with prior art has following advantage: microphone is placed in the airtight housing, voice signal only can pass over by transaudient passage, because with size two paraboloidal focus couplings, make departing from the very short-range signal of main sound source to be difficult to be reflected and to enter in the transaudient passage, thereby reduced noise; In addition, to the sound in normal range (NR),, enter transaudient passage through large and small paraboloidal reflection.This intensive is very sensitive to Sounnd source direction, makes sensitiveer, the fidelity of microphone.
Description of drawings:
Accompanying drawing 1 is a structural front view of the present utility model.
Accompanying drawing 2 is the utility model parallel sound wave or approximate parallel sound wave principle of reflection figure.
The utility model is described in further detail with reference to the accompanying drawings:
Shown in accompanying drawing 1: a kind of microphone sound wave receives intensive, include parabolic 2 and down parabolic 1, the both is the thin-wall case made from the non-resilient plastics of hard, last parabola 2 and down parabolic 1 relative arrangement, last parabolic 2 are fixed on down parabolic 1 top by joint pin 7, and go up parabolic 2 and down parabolic 1 focus coincidence.Plane, upper and lower parabolic opening place is through overfocus.Have centre bore at following parabolic 1 middle part, place, aperture downside is connected with channel of acoustic wave 3.Described channel of acoustic wave 3 is cylindrical shapes of upper end open.Microphone 6 is fixed in the channel of acoustic wave 3.Be fixed with the shell 4 of side opening in following parabolic 1 the outside, in the cavity between shell 4 and transaudient passage 3 and following parabolic 1 charges 8 arranged, play the bumper and absorbing shock effect, it is made with soft elastoplast.The opening part of shell 4 is provided with netted loam cake 5, protects upper and lower parabola not to be damaged.Parabolic 2 middle part also has an acoustic hole.
Shown in accompanying drawing 2: Fig. 2 has showed parallel sound wave or approximate parallel sound wave principle of reflection figure.According to parabolical character, the reverse line of parallel y axle, it is sound wave, after parabola 1 reflects down, after its focus, disperse, because last parabolic 2 focus overlaps with following parabolic 1 focus, and the position is relative, so sound wave is reflected to last parabolic 2 after focus, and is parallel with the y axle, thereby makes sound wave enter transaudient passage 3 to microphone.So the sound source that departs from is difficult for being reflected and enters transaudient passage, has reduced noise.In order to guarantee sound wave energy through upper and lower parabolic reflector, obtain the big and sound wave uniformly of relative microphone area, then parabolic 1 focal length equals 1/4 of parabolic 1 opening diameter down down, last parabolic 2 focal length equal parabola 2 opening diameter 1/4.
Claims (3)
1. a microphone sound wave receives intensive, it is characterized in that: include parabolic (2) and following parabolic (1), both settle relatively, and last parabolic (2) are fixed on down the top of parabola (1) by joint pin (7), and go up the focus coincidence of parabolic (2) and down parabolic (1); The plane, opening place of last parabolic (2) and following parabolic (1) is through overfocus, middle part in down parabolic (1) has centre bore, place, aperture downside is connected with the columnar channel of acoustic wave (3) that is upper end open, microphone (6) is placed in the channel of acoustic wave (3), be fixed with the shell (4) of side opening in the outside of down parabolic (1), in the cavity between shell (4) and transaudient passage (3) and down parabolic (1) charges (8) are arranged, the opening part of shell (4) is provided with netted loam cake (5).
2. microphone sound wave according to claim 1 receives intensive, it is characterized in that: the described focal length of parabola (1) down equals 1/4 of down parabolic (1) opening diameter.
3. microphone sound wave according to claim 1 and 2 receives intensive, it is characterized in that: the described focal length of parabolic (2) equals 1/4 of parabolic (2) opening diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96223950 CN2270334Y (en) | 1996-10-22 | 1996-10-22 | Microphone sound wave receiving enhancing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96223950 CN2270334Y (en) | 1996-10-22 | 1996-10-22 | Microphone sound wave receiving enhancing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2270334Y true CN2270334Y (en) | 1997-12-10 |
Family
ID=33903047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96223950 Expired - Fee Related CN2270334Y (en) | 1996-10-22 | 1996-10-22 | Microphone sound wave receiving enhancing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2270334Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107316545A (en) * | 2017-09-05 | 2017-11-03 | 河南科技大学 | A kind of varifocal sound focusing apparatus for demonstrating and method |
| CN110913292A (en) * | 2018-09-14 | 2020-03-24 | 成都启英泰伦科技有限公司 | A sound insulation cover and microphone structure for microphone is fallen and is made an uproar |
-
1996
- 1996-10-22 CN CN 96223950 patent/CN2270334Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107316545A (en) * | 2017-09-05 | 2017-11-03 | 河南科技大学 | A kind of varifocal sound focusing apparatus for demonstrating and method |
| CN110913292A (en) * | 2018-09-14 | 2020-03-24 | 成都启英泰伦科技有限公司 | A sound insulation cover and microphone structure for microphone is fallen and is made an uproar |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |