CN1998263A - Noise canceling microphone with acoustically tuned ports - Google Patents
Noise canceling microphone with acoustically tuned ports Download PDFInfo
- Publication number
- CN1998263A CN1998263A CN 200480035493 CN200480035493A CN1998263A CN 1998263 A CN1998263 A CN 1998263A CN 200480035493 CN200480035493 CN 200480035493 CN 200480035493 A CN200480035493 A CN 200480035493A CN 1998263 A CN1998263 A CN 1998263A
- Authority
- CN
- China
- Prior art keywords
- noise canceling
- microphone
- canceling microphone
- noise
- voice path
- 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
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Certain embodiments of a noise canceling microphone with acoustically tuned ports are disclosed herein. In one aspect of the invention, the noise canceling microphone may comprise a housing, a transducer for converting received energy received into electrical signals, where the transducer is located in the housing, a front and rear sound pathways to a front and rear sound openings in the transducer, where the front and rear sound pathways may be located on opposite sides of the housing and may be displaced 180 degrees off a vertical axis. The noise canceling microphone may further comprising a boom for supporting the noise canceling microphone, where the boom may be deformed to place the noise canceling microphone near the mouth of the user. For example, the boom may be deformed to place the noise canceling microphone at least ten millimeters away from the edge of the mouth of the user.
Description
For the U.S. Provisional Patent Application 60/507629 (lawyer item sequence number 15226US01) of the exercise question of submitting to September 30 in 2003 for " noise canceling microphone " with acoustically tuned ports, the application quotes this application, this application is proposed priority request and requires the interests of this application, and whole body matters of this application are hereby incorporated by on the whole.
Technical field
Background technology
Conventional omni-directional microphone is configured to the mechanical oscillation that the change transitions on the acoustic pressure of sound wave become the microphone vibrating diaphragm.Microphone is positioned at typically on the suspension rod and can be arranged on any position along suspension rod-from the place ahead of user's oral area to retreating near the ear.When obtaining user's sound, conventional omni-directional microphone also obtains the diversity of settings noise, for example the noise of working equipment, vibrating noise, wind, breathing noise and/or other noises of speaking of chatting.This noise can flood user's sound fully, especially microphone put behind and oral area away from the user in.
Noise removing in the microphone can provide by using CTM close talking microphone design, and wherein the pressure differential between the sound of the inlet of the preceding and rear end of microphone provides microphone output when the user talks, and it is often exported greater than the microphone to farther sound.Even the design of conventional CTM close talking microphone can reduce the obtaining of external noise, their noise reduction performance on the whole is not optimum.
It is very low usually that the more weak and noise that obtain of the noise reduction capability of conventional omni-directional microphone weakens level.Weaken level in order to obtain desirable noise, conventional microphone need be placed on for example user's oral area of very close sound source place.In the time of before microphone is placed on user's oral area, yet follow plosive sonic boom in the speech, increase that can the trigger noise feature.
For a person skilled in the art, by described with reference to the accompanying drawings the present invention in other parts of these systems and the application is compared, restriction and shortcoming conventional and conventional method can become apparent.
Summary of the invention
Specific embodiment of the present invention can be seen in having the noise canceling microphone of acoustically tuned ports.In one aspect of the invention, the energy that noise canceling microphone can comprise housing, be used for receiving changes the transducer of the signal of telecommunication into, wherein transducer be arranged in the housing, the preceding and back voice path of the preceding and back sound openings in the transducer, wherein should before and the back voice path can be arranged on housing opposite side and can be at vertical axis superior displacement 180 degree.This noise canceling microphone can further comprise the suspension rod that is used to support this noise canceling microphone, and wherein this suspension rod deformability is with near the oral area that this noise canceling microphone is placed on the user.
For example, the suspension rod deformability is to be placed on noise canceling microphone at least ten millimeters places, edge of the oral area that leaves the user.Noise canceling microphone also can comprise one or more be used for and at the electricity lead-in wire of the signal of telecommunication communication of hull outside.Before and the back voice path can mechanical adjustment, acoustic mass and/or the acoustic volume by before changing and back voice path for example, thus do not need the electronics adjustment.The change of acoustic mass and/or acoustic volume can be by before changing and back voice path length and area at least one of them.Noise canceling microphone can further be included in the unidirectional microphone in the housing, and wherein this unidirectional microphone can be transformed into the signal of telecommunication with the acoustic energy of receiving.Noise canceling microphone also can comprise the headphone that is connected on the suspension rod.
In another aspect of this invention, the energy that noise canceling microphone can comprise housing, be used for receiving changes the transducer of the signal of telecommunication into, wherein transducer be arranged in the housing, the preceding and back voice path of the preceding and back sound openings in the transducer, wherein should before and back voice path can be located and mechanical adjustment makes noise canceling microphone that the reduction to external noise greater than 15dB can be provided.It is 18dB at least that noise reduction can be included in the 300Hz place.
Preceding and back voice path can be located with mechanical adjustment is feasible and be can be obtained up to the noise reduction of few 15dB and do not insert the high frequency noise that the user can notice.Noise canceling microphone can further comprise the suspension rod that is used to support this noise canceling microphone, and wherein this suspension rod deformability is with near the oral area that this noise canceling microphone is placed on the user.For example, the suspension rod deformability is to be placed on noise canceling microphone at least ten millimeters places, edge of the oral area that leaves the user.Noise canceling microphone also can comprise one or more be used for and at the electricity lead-in wire of the signal of telecommunication communication of hull outside.
But preceding and back voice path mechanical adjustment is for example passed through to change acoustic mass and/or acoustic volume preceding and the back voice path, thereby is not needed the electronics adjustment.The change of acoustic mass and/or acoustic volume can be by before changing and back voice path length and area at least one of them.Noise canceling microphone can further be included in the unidirectional microphone in the housing, and wherein this unidirectional microphone can be transformed into the signal of telecommunication with the acoustic energy of receiving.
From following specification and accompanying drawing, will with the details of understanding these and other advantage of the present invention, aspect and novel characteristics and illustrational embodiment more fully.
Description of drawings
Figure 1A illustrates according to one embodiment of the invention, has the diagram of frequency response of the noise canceling microphone of acoustically tuned ports;
Figure 1B illustrates the diagram of the frequency response of the conventional noise canceling microphone with noise reduction performance, its can with according to one embodiment of the invention, the frequency response of the noise canceling microphone among Figure 1A is compared;
Fig. 2 illustrates according to one embodiment of the invention, has the diagram of the noise canceling microphone of acoustically tuned ports;
Fig. 3 illustrates according to one embodiment of the invention, has the example view of the noise canceling microphone that is installed in the acoustically tuned ports on the suspension rod;
Fig. 4 A illustrates according to one embodiment of the invention, has the diagram of axle upper frequency response of the noise canceling microphone of acoustically tuned ports;
Fig. 4 B illustrates according to one embodiment of the invention, has the diagram of frequency response of 90 degree rotations of the noise canceling microphone of acoustically tuned ports;
Fig. 4 C illustrates according to one embodiment of the invention, has the diagram of frequency response of 180 degree rotations of the noise canceling microphone of acoustically tuned ports.
Embodiment
Can in having the noise canceling microphone of acoustically tuned ports, find each side of the present invention.By acoustic volume and the acoustic mass in the voice path of before changing in noise canceling microphone and back, can realize the noise reduction higher than conventional noise canceling microphone.
Figure 1A illustrates according to one embodiment of the invention, has the diagram of frequency response of the noise canceling microphone of acoustically tuned ports.The present invention one exemplary aspect in, can in the noise canceling microphone of the acoustically tuned ports on having a side that is installed in face, weaken level by measurement noise, and with the opposition side that is installed in face on the comparing of object of reference microphone.With reference to Figure 1A, the value of the frequency response of object of reference microphone is given as zero, shown in the line among the figure 100.
Figure 1B illustrates the diagram of the frequency response of the conventional noise canceling microphone with noise reduction performance, its can with according to one embodiment of the invention, the frequency response of the noise canceling microphone among Figure 1A is compared.With reference to Figure 1B, the value of the frequency response of object of reference microphone can be given as zero, shown in the line among the figure 103.Line 104 among the figure can represent to work as the conventional microphone of Figure 1B in the position identical with the noise canceling microphone with acoustically tuned ports of Figure 1A, promptly ten millimeters when locating on the oral area limit of leaving the user, the frequency response of the corresponding object of reference microphone of conventional noise canceling microphone.Line 105 among the figure can represent that conventional noise canceling microphone is with respect to the frequency response of object of reference microphone when conventional microphone is placed as ten millimeters of oral areas leaving the user and sound source and is diffuse sound field or reverberant field.
With reference to Figure 1A and 1B, conventional noise canceling microphone can be represented respectively by the line among the figure 104 and 101 with the frequency response characteristic with noise canceling microphone of acoustically tuned ports.In addition, conventional noise canceling microphone can be by line among the figure 105 and 102 expressions to the response of diffusion noise sound field with the noise canceling microphone with acoustically tuned ports.By this way, by the frequency response characteristic of conventional noise canceling microphone and the noise canceling microphone with acoustically tuned ports is compared to the response of diffusion noise sound field separately with them, can manifest the better noise suppression of the about 5dB of average out to.In addition, the noise canceling microphone with acoustically tuned ports can produce almost flat sound and closely say (original position) response on whole bandwidth, as the line among the figure 101 reflects.
In one aspect of the invention, the noise canceling microphone with acoustically tuned ports can be used in the application of headphone microphone group for example, and uses in the application of voice recognition technology.In addition, the noise canceling microphone with acoustically tuned ports also can use during the two in the vehicle that for example has 100dB SPL vehicle noise.
In another aspect of this invention, can reach at the 1000Hz place approximate 12dB and at the 300Hz place near 20dB and at the 8dB of 3000Hz place, the line 101 represented example noise with acoustically tuned ports from figure are eliminated the frequency response characteristic of microphone, in the comparison of the noise response of the represented object of reference microphone of the line 102 among the figure, can obviously prove this point.On the other hand, conventional noise canceling microphone only can reach the noise suppression at 1000Hz 8dB, at 300Hz only for the noise of approximate 10dB reduces, and at the 3000Hz place noise suppression of 2dB only, as the line among the figure 104 and 105 shown.
In another aspect of this invention, have the example noise elimination microphone of acoustically tuned ports, can be suitable for implementation in the conventional omni-directional microphone above noise minimizing of 20dB at least of test ratio under the similar environment.For example under the environment similar, test to example noise elimination microphone with acoustically tuned ports, conventional microphone by the Jabra manufacturing, it is characterized by at the 1kHz place be-the 9dB noise reduces, in other words conj.or perhaps than the example noise with acoustically tuned ports eliminate the noise minimizing of microphone low 21dB.
Fig. 2 illustrates according to one embodiment of the invention, has the diagram of the noise canceling microphone of acoustically tuned ports.With reference to figure 2, noise canceling microphone with acoustically tuned ports 200 can comprise microphone housing 208, front port 201, rear port 202, has the inside microphone 203 of front side 209 and dorsal part 210, advances into passage 204, back admission passage 209, and microphone electricity lead-in wire 206 and 207.Inlet 214 and back inlet 215 before the front side 209 of inner microphone 203 and dorsal part 210 can comprise respectively.
Preceding access road 204 can be connected the preceding inlet 214 of front port 201 with inner microphone front side 209.Back admission passage 205 can be connected the back inlet 215 of rear port 202 with the dorsal part 210 of inner microphone.In another embodiment of the present invention, can not have initiatively electronics adjustment of use on the noise canceling microphone of acoustically tuned ports.About this point, port 201 and 202 sound adjustment can be by changing by the acoustic volume and/or the acoustic mass that advance into the chamber that passage 204 and back admission passage 205 form.
Acoustic mass M can be by equation M=.0016 * (L/A), and wherein L is a length and A is the area that advances into passage 204 or back admission passage 205.Acoustic volume V can be by equation V=L * A decision.Can select independently volume harmony learn quality to the ratio of volume so that whole best performanceization.Can be optimized to obtain high noise minimizing level and close talking sensitivity by the acoustic volume that advances into the channel lumens that passage 204 and back admission passage 205 form.Although can use the unidirectional microphone module as inner microphone 203, the present invention is not limited to this mode, but, can in noise canceling microphone, use the microphone module of other types with acoustically tuned ports 200.
Fig. 3 illustrates according to one embodiment of the invention, has the example view of the noise canceling microphone that is installed in the acoustically tuned ports on the suspension rod.With reference to figure 3, the noise canceling microphone with acoustically tuned ports 301 can comprise before the sound adjustment and rear port 302 and 303.Microphone 301 can be installed on the suspension rod 305, and this suspension rod can be the part of headphone microphone group.Thereby suspension rod 305 can be out of shape at the edge of user's oral area and the distance 306 that has between the noise canceling microphone of acoustically tuned ports 301 and can be changed.In the present invention's one exemplary aspect, thereby suspension rod 305 can be adjusted this distance 306 and provides the plosive performance that avoids that combines outstanding noise suppression at least ten millimeters noise canceling microphones with acoustically tuned ports 301.
In another aspect of this invention, have the position of the microphone of acoustically tuned ports 301 can corresponding sound source for example user's oral area end and change.By this way, the position of microphone 301, thereby and the position of microphone port with advance into after enter channel lumens volume can optimised and conventional microphone compare the highest noise of realization and reduce and close talking sensitivity.
Fig. 4 A illustrates according to one embodiment of the invention, has the diagram of axle upper frequency response of the noise canceling microphone of acoustically tuned ports.In the present invention's one exemplary aspect, can in the noise canceling microphone 410 of the acoustically tuned ports on having a side that is installed in face, weaken level and the response of axle upper frequency by measurement noise, and it is compared with the object of reference microphone on the opposition side that is installed in face.
With reference to figure 4A, the value of the frequency response of object of reference microphone can be given as zero, shown in the line among the figure 400.Line 401 among the figure can represent to have the axle upper frequency response of the example noise elimination microphone 410 of acoustically tuned ports with respect to the object of reference microphone.Line 402 among the figure can show the frequency response to the environmental noise of testing level of using noise canceling microphone 410 and obtaining.In this case, first microphone inlet 412 is near oral areas, and second microphone inlet 414 in the outside of microphone box away from oral area, the result is to reach the optimal level that noise reduces.For example, the noise that can reach approximate 10dB at the 1000Hz place reduces and reduces at the noise that reaches approximate 20dB at the 300Hz place.
Fig. 4 B illustrates according to one embodiment of the invention, has the diagram of frequency response of 90 degree rotations of the noise canceling microphone of acoustically tuned ports.In the present invention's one exemplary aspect, can in the noise canceling microphone 416 of the acoustically tuned ports on having a side that is installed in face, weaken level and 90 degree speed responses by measurement noise, and it is compared with the object of reference microphone on the opposition side that is installed in face.
With reference to figure 4B, the value of the frequency response of object of reference microphone can be given as zero, shown in the line among the figure 403.Line 404 among the figure can represent to have the 90 degree speeds responses of the example noise elimination microphone 416 of acoustically tuned ports with respect to the object of reference microphone.Line 405 among the figure can show the frequency response to the environmental noise of testing level of using noise canceling microphone 416 and obtaining.In this case, the microphone box of noise canceling microphone 416 can revolve and turn 90 degrees, from ingress port 420 then towards the below and preceding ingress port 418 towards the top.The result is to compare the decline of noise minimizing level with the noise minimizing level shown in Fig. 4 A.For example, the noise that can reach approximate 5dB at the 1000Hz place reduces and reduces at the noise that reaches approximate 10dB at the 300Hz place.
Fig. 4 C illustrates according to one embodiment of the invention, has the diagram of frequency response of 180 degree rotations of the noise canceling microphone of acoustically tuned ports.In the present invention's one exemplary aspect, can in the noise canceling microphone 422 of the acoustically tuned ports on having a side that is installed in face, weaken level and 180 degree speed responses by measurement noise, and it is compared with the object of reference microphone on the opposition side that is installed in face.
With reference to figure 4C, the value of the frequency response of object of reference microphone can be given as zero, shown in the line among the figure 406.Line 407 among the figure can represent to have the 180 degree speeds responses of the example noise elimination microphone 422 of acoustically tuned ports with respect to the object of reference microphone.Line 408 among the figure can show the frequency response to the environmental noise of testing level of using noise canceling microphone 422 and obtaining.In this case, the microphone box of noise canceling microphone 422 can the Rotate 180 degree, from ingress port 422 then near faces and preceding ingress port 424 away from face.The result is, compares with the noise minimizing level shown in Fig. 4 B with Fig. 4 A, and noise minimizing level descends manyly.For example, the noise that can reach approximate-2dB at the 1000Hz place reduces and reduces at the noise that reaches approximate 3dB at the 300Hz place.
Although described the present invention, it will be understood by those skilled in the art that can not depart from scope of the present invention makes various changes and carry out the various replacements that are equal to reference to specific embodiment.In addition, can under instruction of the present invention, not depart from scope of the present invention and carry out many modifications to adapt to specific situation or material.Therefore, the present invention means and is not limited to disclosed specific embodiment, but comprises all embodiment that fall in the claims.
Claims (according to the modification of the 19th of treaty)
1. noise canceling microphone comprises:
Housing;
At least one energy that is used for receiving changes the transducer of the signal of telecommunication into, and wherein this at least one transducer is arranged in the housing;
The preceding voice path of the preceding sound openings at least one transducer, wherein should before voice path comprise front port path, and the passage that advances into second diameter and second length with first diameter and first length;
The back voice path of the back sound openings at least one transducer; And
Wherein should before and the back voice path be arranged on housing opposite side and can be at vertical axis superior displacement 180 degree.
2. noise canceling microphone as claimed in claim 1 also comprises the suspension rod that is used to support this noise canceling microphone.
3. noise canceling microphone as claimed in claim 2 is characterized in that, this suspension rod deformability is with near the oral area that this noise canceling microphone is placed on the user.
4. noise canceling microphone as claimed in claim 3 is characterized in that, the suspension rod deformability is to be placed on noise canceling microphone at least ten millimeters places, edge of the oral area that leaves the user.
5. noise canceling microphone as claimed in claim 1 comprises that also many are used for and the electricity of the signal of telecommunication communication outside housing lead-in wire.
6. noise canceling microphone as claimed in claim 1 is characterized in that, preceding and back voice path can mechanical adjustment, thereby does not need the electronics adjustment.
7. noise canceling microphone as claimed in claim 6 is characterized in that, mechanical adjustment preceding and back voice path is by changing the acoustic mass of sound and back voice path.
8. noise canceling microphone as claimed in claim 7 is characterized in that, the change of sound quality be by the length of before changing and back voice path and area at least one of them.
9. noise canceling microphone as claimed in claim 6 is characterized in that, mechanical adjustment preceding and back voice path is by changing the acoustic volume of sound and back voice path.
10. noise canceling microphone as claimed in claim 9 is characterized in that, the change of acoustic volume be by the length of before changing and back voice path and area at least one of them.
11. noise canceling microphone as claimed in claim 1 also is included in the unidirectional microphone in the housing, wherein this unidirectional microphone can be transformed into the signal of telecommunication with the acoustic energy of receiving.
12. noise canceling microphone as claimed in claim 2 also comprises the headphone that is connected on the suspension rod.
13. a noise canceling microphone comprises:
Housing;
At least one energy that is used for receiving changes the transducer of the signal of telecommunication into, and wherein this at least one transducer is arranged in the housing;
The preceding voice path of the preceding sound openings at least one transducer, wherein should before voice path comprise front port path, and the passage that advances into second diameter and second length with first diameter and first length;
The back voice path of the back sound openings at least one transducer; And
Wherein should before and back voice path can locate and mechanical adjustment makes noise canceling microphone that the reduction greater than 15dB to outside acoustic noise is provided.
14. noise canceling microphone as claimed in claim 13 is characterized in that, it is 18dB at least that noise reduction can be included in the 300Hz place.
15. noise canceling microphone as claimed in claim 13 is characterized in that, preceding and back voice path can be located with mechanical adjustment is feasible and be can be obtained up to the noise reduction of few 15dB and do not insert the high frequency noise that the user can notice.
16. noise canceling microphone as claimed in claim 13 also comprises the suspension rod that is used to support this noise canceling microphone.
17. noise canceling microphone as claimed in claim 16 is characterized in that, this suspension rod deformability is with near the oral area that this noise canceling microphone is placed on the user.
18. noise canceling microphone as claimed in claim 17 is characterized in that, the suspension rod deformability is to be placed on noise canceling microphone at least ten millimeters places, edge of the oral area that leaves the user.
19. noise canceling microphone as claimed in claim 13 comprises that also many are used for and the electricity of the signal of telecommunication communication outside housing lead-in wire.
20. noise canceling microphone as claimed in claim 13 is characterized in that, mechanical adjustment preceding and back voice path is by changing the acoustic mass of sound and back voice path.
21. noise canceling microphone as claimed in claim 20 is characterized in that, the change of acoustic mass be by the length of before changing and back voice path and area at least one of them.
22. noise canceling microphone as claimed in claim 13 is characterized in that, mechanical adjustment preceding and back voice path is by changing the acoustic volume of sound and back voice path.
23. noise canceling microphone as claimed in claim 22 is characterized in that, the change of acoustic volume be by the length of before changing and back voice path and area at least one of them.
24. noise canceling microphone as claimed in claim 13 also is included in the unidirectional microphone in the housing, wherein this unidirectional microphone can be transformed into the signal of telecommunication with the acoustic energy of receiving.
25. noise canceling microphone as claimed in claim 1 is characterized in that, second diameter is greater than first diameter.
26. noise canceling microphone as claimed in claim 1 is characterized in that, the mechanical adjustment of preceding voice path be by change first diameter, first length, second diameter and second length at least one of them.
27. noise canceling microphone as claimed in claim 1 is characterized in that, advances into passage and comprises at least two channel parts with different-diameter.
28. noise canceling microphone as claimed in claim 1 is characterized in that, back voice path comprises the rear port path with the 3rd diameter and the 3rd length, and the back admission passage with the 4th diameter and the 4th length.
29. noise canceling microphone as claimed in claim 28 is characterized in that, the 4th diameter is greater than the 3rd diameter.
30. noise canceling microphone as claimed in claim 28 is characterized in that, the mechanical adjustment of back voice path be by change the 3rd diameter, the 3rd length, the 4th diameter and the 4th length at least one of them.
31. noise canceling microphone as claimed in claim 1 is characterized in that, housing is the elongated oval ball shape.
32. noise canceling microphone as claimed in claim 1, it is characterized in that, before voice path extend to preceding sound openings described at least one transducer from a procapsid opening, then voice path extends to back sound openings described at least one transducer from a back casing opening.
33. noise canceling microphone as claimed in claim 32 is characterized in that, this procapsid opening and this back casing opening are positioned at the opposite side of housing.
34. noise canceling microphone as claimed in claim 32 is characterized in that, is chosen as when noise canceling microphone is worn by the user to the primary importance of procapsid opening with to the second place of back casing opening, and the diffraction of acoustic streaming is minimized.
Claims (24)
1. noise canceling microphone comprises:
Housing;
At least one energy that is used for receiving changes the transducer of the signal of telecommunication into, and wherein this at least one transducer is arranged in the housing;
The preceding voice path of the preceding sound openings at least one transducer;
The back voice path of the back sound openings at least one transducer; And
Wherein should before and the back voice path be arranged on housing opposite side and can be at vertical axis superior displacement 180 degree.
2. noise canceling microphone as claimed in claim 1 also comprises the suspension rod that is used to support this noise canceling microphone.
3. noise canceling microphone as claimed in claim 2 is characterized in that, this suspension rod deformability is with near the oral area that this noise canceling microphone is placed on the user.
4. noise canceling microphone as claimed in claim 3 is characterized in that, the suspension rod deformability is to be placed on noise canceling microphone at least ten millimeters places, edge of the oral area that leaves the user.
5. noise canceling microphone as claimed in claim 1 comprises that also many are used for and the electricity of the signal of telecommunication communication outside housing lead-in wire.
6. noise canceling microphone as claimed in claim 1 is characterized in that, preceding and back voice path can mechanical adjustment, thereby does not need the electronics adjustment.
7. noise canceling microphone as claimed in claim 6 is characterized in that, mechanical adjustment preceding and back voice path is by changing the acoustic mass of sound and back voice path.
8. noise canceling microphone as claimed in claim 7 is characterized in that, the change of sound quality be by the length of before changing and back voice path and area at least one of them.
9. noise canceling microphone as claimed in claim 6 is characterized in that, mechanical adjustment preceding and back voice path is by changing the acoustic volume of sound and back voice path.
10. noise canceling microphone as claimed in claim 9 is characterized in that, the change of acoustic volume be by the length of before changing and back voice path and area at least one of them.
11. noise canceling microphone as claimed in claim 1 also is included in the unidirectional microphone in the housing, wherein this unidirectional microphone can be transformed into the signal of telecommunication with the acoustic energy of receiving.
12. noise canceling microphone as claimed in claim 2 also comprises the headphone that is connected on the suspension rod.
13. a noise canceling microphone comprises:
Housing;
At least one energy that is used for receiving changes the transducer of the signal of telecommunication into, and wherein this at least one transducer is arranged in the housing;
The preceding voice path of the preceding sound openings at least one transducer;
The back voice path of the back sound openings at least one transducer; And
Wherein should before and back voice path can locate and mechanical adjustment makes noise canceling microphone that the reduction greater than 15dB to outside acoustic noise is provided.
14. noise canceling microphone as claimed in claim 13 is characterized in that, it is 18dB at least that noise reduction can be included on the 300Hz.
15. noise canceling microphone as claimed in claim 13 is characterized in that, preceding and back voice path can be located with mechanical adjustment is feasible and be can be obtained up to the noise reduction of few 15dB and do not insert the high frequency noise that the user can notice.
16. noise canceling microphone as claimed in claim 13 also comprises the suspension rod that is used to support this noise canceling microphone.
17. noise canceling microphone as claimed in claim 16 is characterized in that, this suspension rod deformability is with near the oral area that this noise canceling microphone is placed on the user.
18. noise canceling microphone as claimed in claim 17 is characterized in that, the suspension rod deformability is to be placed on noise canceling microphone at least ten millimeters places, edge of the oral area that leaves the user.
19. noise canceling microphone as claimed in claim 13 comprises that also many are used for and the electricity of the signal of telecommunication communication outside housing lead-in wire.
20. noise canceling microphone as claimed in claim 13 is characterized in that, mechanical adjustment preceding and back voice path is by changing the acoustic mass of sound and back voice path.
21. noise canceling microphone as claimed in claim 20 is characterized in that, the change of acoustic mass be by the length of before changing and back voice path and area at least one of them.
22. noise canceling microphone as claimed in claim 13 is characterized in that, mechanical adjustment preceding and back voice path is by changing the acoustic volume of sound and back voice path.
23. noise canceling microphone as claimed in claim 22 is characterized in that, the change of acoustic volume be by the length of before changing and back voice path and area at least one of them.
24. noise canceling microphone as claimed in claim 13 also is included in the unidirectional microphone in the housing, wherein this unidirectional microphone can be transformed into the signal of telecommunication with the acoustic energy of receiving.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/951,458 US7162041B2 (en) | 2003-09-30 | 2004-09-27 | Noise canceling microphone with acoustically tuned ports |
| US10/951,458 | 2004-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1998263A true CN1998263A (en) | 2007-07-11 |
Family
ID=38252282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200480035493 Pending CN1998263A (en) | 2004-09-27 | 2004-09-30 | Noise canceling microphone with acoustically tuned ports |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1998263A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738928B (en) * | 2008-11-05 | 2012-08-22 | 斯沃奇集团研究和开发有限公司 | Watch including a built-in microphone in the watchcase |
-
2004
- 2004-09-30 CN CN 200480035493 patent/CN1998263A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738928B (en) * | 2008-11-05 | 2012-08-22 | 斯沃奇集团研究和开发有限公司 | Watch including a built-in microphone in the watchcase |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11657793B2 (en) | Voice sensing using multiple microphones | |
| US7162041B2 (en) | Noise canceling microphone with acoustically tuned ports | |
| US9237394B2 (en) | Canal type earphone with pressure equilibrium means | |
| US8340309B2 (en) | Noise suppressing multi-microphone headset | |
| US10262676B2 (en) | Multi-microphone pop noise control | |
| JP3999277B2 (en) | Noise control device | |
| US6700985B1 (en) | Ear level noise rejection voice pickup method and apparatus | |
| US7881464B1 (en) | Microphone with reduced noise | |
| WO2001006811A1 (en) | Noise control device | |
| GB2429600A (en) | Low-noise transmitting receiving earset or earpiece | |
| JP2007300513A (en) | Microphone device | |
| US6009184A (en) | Noise control device for a boom mounted noise-canceling microphone | |
| CN1998263A (en) | Noise canceling microphone with acoustically tuned ports | |
| US7751575B1 (en) | Microphone system for communication devices | |
| Diirbecker | Speech enhancement using small microphone arrays with optimized directivity | |
| US20030008676A1 (en) | Communication device having a microphone system with optimal acoustic transmission line design for improved frequency and directional response | |
| KR200289499Y1 (en) | Cellular phone having multistage mike | |
| CN113259820A (en) | Microphone (CN) |
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 |
Open date: 20070711 |