CN1292984A - Directional microphone - Google Patents
Directional microphone Download PDFInfo
- Publication number
- CN1292984A CN1292984A CN 99803676 CN99803676A CN1292984A CN 1292984 A CN1292984 A CN 1292984A CN 99803676 CN99803676 CN 99803676 CN 99803676 A CN99803676 A CN 99803676A CN 1292984 A CN1292984 A CN 1292984A
- Authority
- CN
- China
- Prior art keywords
- microphone
- aforementioned arbitrary
- pipe
- flock
- blind end
- 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.)
- Pending
Links
Images
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
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/342—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for microphones
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Building Environments (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Pipe Accessories (AREA)
- Telephone Set Structure (AREA)
Abstract
Device for use with a microphone, for selective muffling of surrounding noise, consisting of a tube with a closed end that houses the microphone, and an open end that faces the surroundings, distinguished by the tube being coated on the inside with sound-absorbent material.
Description
Often a problem that runs in the conversation of driving is that the noise that motor vehicle produces can interference communications.When microphone was far away apart from driver's position, this problem certainly will be more outstanding.The loosening number of components and parts that needs when using phone by farthest reducing can increase traffic safety.Therefore, for example, just wish to be placed on the instrument board microphone or close instrument board.
Following device can be used for forming so a kind of optionally microphone, makes it can balancedly pick up more sound and the outside noise still less of speaking.This scheme certainly is used for the phone of other type, for example the speaker-phone in the office.
The invention solves the problems referred to above.According to claim 1, the invention provides device a kind of and that microphone uses together, can carry out noise reduction to noise on every side selectively.In the dependent claims of back, realized that decision design of the present invention becomes example.
The present invention is made of a pipe, and side scribbles a sound-absorbing surface within it, for example flock (flock) (vertical fiber utilizes static to apply these fibers).The openend of pipe is facing to driver's mouth.Microphone is placed on the opposite end of pipe.This end seals.Face coat has been cut down the sound wave of running into the pipe opening with an angle, and will arrive microphone along the sonic transmissions that the tube length direction is propagated.
Apply flock by outside, also microphone can be installed in the inboard of pipe at microphone.When the contact of the surface of two coating flocks, will form a height friction joint with acoustical absorbance properties.In addition, microphone can be installed in the sound-absorbing foam material, or be suspended in the elastic material that does not transmit sound wave.
In order further to increase the selectivity output of this device, a plurality of parallel pipes can be installed.Perhaps, a pipe is come by inner channels separated along its length direction.
By the bottom of pipe being made, can amplify output as parabolic shape.Like this, sound can be concentrated facing to microphone.
For the direction that makes whole device can be regulated, for example, a friction joint can be installed in tube end.This joint can be a kind of ball and cup-and-ball joint or hinge joint.A kind ofly produce enough frictions and change the pipe direction at an easy rate, can avoid again simultaneously applying flock at articular surface because the straightforward procedure that vibration changes is.So also can proofread and correct the whistle when change in location in advance.
In the accompanying drawing:
Fig. 1 is the transverse side view according to device of the present invention;
Fig. 2 is the perspective cross-sectional view of another example of the present invention, and wherein a plurality of pipes very closely be arranged in parallel each other;
Fig. 3 is another example of the present invention, and wherein pipe has been divided into a plurality of sound channels by a plurality of separators of length direction;
Fig. 4 is another example of the present invention, and wherein pipe is surrounded by a concentric outer tube, and the inboard of this outer tube also scribbles sound-absorbing material.
The present invention is not limited to described design example with above-mentioned feature, but in the framework of appending claims, can freely change.
Claims (11)
1. device that uses with microphone, can be selectively to around noise carry out noise reduction, this device is made of a pipe, this pipe has a blind end that holds microphone and towards the openend of surrounding environment, it is characterized in that the inboard of pipe scribbles sound-absorbing material.
2. according to the device that uses with microphone of claim 1, it is characterized in that sound-absorbing material is made by fiber flock material.
3. according to the device that uses with microphone of claim 1 or 2, it is characterized in that the inside tube surface that the direction of the fiber of flock is adhered to it basically meets at right angles.
4. according to the device that uses with microphone of aforementioned arbitrary claim, it is characterized in that a plurality of pipes are installed in parallel with each other.
5. according to the device that uses with microphone of aforementioned arbitrary claim, it is characterized in that, described pipe by one or more concentric pipes institute around.
6. according to the device that uses with microphone of aforementioned arbitrary claim, it is characterized in that described pipe is become a plurality of parallel sound channels by the channels separated on a plurality of length directions.
7. according to the device that uses with microphone of aforementioned arbitrary claim, it is characterized in that the blind end of described pipe is a paraboloidal, microphone is positioned at paraboloidal center.
8. according to the device that uses with microphone of aforementioned arbitrary claim, it is characterized in that microphone is installed in the blind end of described pipe, the fiber flock coating synergy of this flock coating and described inside tube by fiber flock coating.
9. according to the device that uses with microphone of aforementioned arbitrary claim, it is characterized in that microphone is installed in the blind end of described pipe by foamed material, perhaps is suspended in the elastic material.
10. according to the device that uses with microphone of aforementioned arbitrary claim, it is characterized in that, on the installed part in the friction joint by microphone being anchored to a dribbling and cup-and-ball joint or hinge joint etc., the direction that can regulate described device.
11. the device that uses with microphone according to claim 10 is characterized in that, the surface in friction joint scribbles the flock material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9800850-1 | 1998-03-12 | ||
| SE9800850A SE9800850D0 (en) | 1998-03-12 | 1998-03-12 | Directed microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1292984A true CN1292984A (en) | 2001-04-25 |
Family
ID=20410551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99803676 Pending CN1292984A (en) | 1998-03-12 | 1999-03-12 | Directional microphone |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1062838A1 (en) |
| JP (1) | JP2002508641A (en) |
| CN (1) | CN1292984A (en) |
| AU (1) | AU2865899A (en) |
| SE (1) | SE9800850D0 (en) |
| WO (1) | WO1999049697A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651920B (en) * | 2009-06-19 | 2013-05-22 | 瑞声声学科技(深圳)有限公司 | Microphone distortion test system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8737662B2 (en) | 2012-09-05 | 2014-05-27 | Kaotica Corporation | Noise mitigating microphone attachment |
| US9118989B2 (en) | 2012-09-05 | 2015-08-25 | Kaotica Corporation | Noise mitigating microphone attachment |
| USD733690S1 (en) | 2013-10-30 | 2015-07-07 | Kaotica Corporation | Noise mitigating microphone attachment |
| US10701481B2 (en) | 2018-11-14 | 2020-06-30 | Townsend Labs Inc | Microphone sound isolation baffle and system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2027318A (en) * | 1978-07-21 | 1980-02-13 | Farmer N | Sound detectors |
| US4555598A (en) * | 1983-09-21 | 1985-11-26 | At&T Bell Laboratories | Teleconferencing acoustic transducer |
| DE3901158A1 (en) * | 1989-01-17 | 1990-07-19 | Messerschmitt Boelkow Blohm | Directional microphone |
| US4967874A (en) * | 1989-11-13 | 1990-11-06 | Scalli Jeffrey R | Microphone baffle apparatus |
| GB2255687B (en) * | 1991-05-07 | 1994-09-21 | Matsushita Electric Ind Co Ltd | Radio telephone apparatus |
| US5692060A (en) * | 1995-05-01 | 1997-11-25 | Knowles Electronics, Inc. | Unidirectional microphone |
-
1998
- 1998-03-12 SE SE9800850A patent/SE9800850D0/en unknown
-
1999
- 1999-03-12 AU AU28658/99A patent/AU2865899A/en not_active Abandoned
- 1999-03-12 CN CN 99803676 patent/CN1292984A/en active Pending
- 1999-03-12 EP EP99909462A patent/EP1062838A1/en not_active Withdrawn
- 1999-03-12 JP JP2000538538A patent/JP2002508641A/en active Pending
- 1999-03-12 WO PCT/SE1999/000390 patent/WO1999049697A1/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651920B (en) * | 2009-06-19 | 2013-05-22 | 瑞声声学科技(深圳)有限公司 | Microphone distortion test system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002508641A (en) | 2002-03-19 |
| SE9800850D0 (en) | 1998-03-12 |
| EP1062838A1 (en) | 2000-12-27 |
| WO1999049697A1 (en) | 1999-09-30 |
| AU2865899A (en) | 1999-10-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |