US4511768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mounting arrangement for altering a microphone's frequency response
Assignee: Motorola Solutions Inc
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Filing: 1982-10-29
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Granted: 1985-04-16
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Expires: 2002-10-29
Abstract
Abstract A microphone mounting arrangement for altering the microphone's audio frequency response characteristic comprises a microphone disposed within an enclosure bounded by a loudspeakers cone on one side and a flexible diaphragm on the other side. The microphone is preferably mounted to a web-like mounting structure which is sandwiched between the loudspeaker and the flexible diaphragm. The resonant characteristic of the enclosure selectively alters the intensity of soundwaves impinging upon the diaphragm so that enclosed microphone's frequency response is altered. Improved intelligibility in high noise level environment is thereby attained.
Inventors
- 👤 Bakulesh B. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:15
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/222; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49005
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
65 words
A microphone mounting arrangement for mechanically altering the audio frequency response characteristics of the microphone, comprising: a loudspeaker having a cone; a flexible diaphragm mechanically coupled to said cone so that said cone and said diaphragm substantially bound a resonant enclosure; a microphone disposed within said enclosure; and mounting means for mounting said microphone in a fixed physical relationship with said diaphragm and said loudspeaker.
Claim 2
Dependent Claim
65 words
A microphone mounting arrangement for mechanically altering the audio frequency response characteristics of the microphone, comprising: a loudspeaker having a cone; a flexible diaphragm mechanically coupled to said cone so that said cone and said diaphragm substantially bound a resonant enclosure; a microphone disposed within said enclosure; and mounting means for mounting said microphone in a fixed physical relationship with said diaphragm and said loudspeaker.
Claim 3
Dependent Claim
25 words
The arrangement of claim 1, wherein said diaphragm is mounted to a rigid ring having a diameter approximately equal to the diameter of said loudspeaker.
Claim 4
Dependent Claim
21 words
The arrangement of claim 2, wherein said mounting means includes a rigid web-like frame disposed between said loudspeaker and said diaphragm.
Claim 5
Dependent Claim
14 words
The arrangement of claim 3, wherein said microphone is attached to said web-like frame.
Claim 6
Dependent Claim
17 words
The arrangement of claim 4, wherein said microphone is substantially coaxial with the cone of said loudspeaker.
Claim 7
Dependent Claim
18 words
The arrangement of claim 5, wherein said diaphragm is composed of a fabric impregnated with a waterproofing material.
Claim 8
Dependent Claim
13 words
The arrangement of claim 6, wherein said microphone is an electret microphone cartridge.
Claim 9
Dependent Claim
13 words
The arrangement of claim 5, wherein said diaphragm is composed of rubberized silk.
Claim 10
Dependent Claim
16 words
The arrangement of claim 8, wherein said microphone is disposed approximately 0.030 inches from said diaphragm.
Claim 11
Dependent Claim
18 words
The arrangement of claim 9, further including a speaker grille disposed adjacent and substantially parallel to said diaphragm.
Claim 12
Dependent Claim
15 words
The arrangment of claim 10, wherein said diaphragm is approximately 0.030 inches from said grille.
Claim 13
Dependent Claim
15 words
The arrangement of claim 11, wherein said loudspeaker has a diameter of approximately two inches.
Claim 14
Dependent Claim
16 words
The arrangement of claim 12, wherein said loudspeaker has a bass resonance of approximately 600 Hz.
Claim 15
Dependent Claim
88 words
A microphone mounting arrangement for mechanically altering the microphone's audio frequency response characteristics, comprising: a loudspeaker having a cone; a flexible rubberized silk diaphragm mounted to a rigid mounting ring; a substantially acoustically transparent rigid web-like frame disposed between and mechanically coupling said loudspeaker and said diaphragm so that said cone and said diaphragm substantially bound a resonant enclosure; and an electret microphone cartridge attached to said frame within said resonant enclosure so that said microphone's audio characteristics are shaped by the resonant characteristics of the resonant enclosure.
Claim 16
Dependent Claim
88 words
A microphone mounting arrangement for mechanically altering the microphone's audio frequency response characteristics, comprising: a loudspeaker having a cone; a flexible rubberized silk diaphragm mounted to a rigid mounting ring; a substantially acoustically transparent rigid web-like frame disposed between and mechanically coupling said loudspeaker and said diaphragm so that said cone and said diaphragm substantially bound a resonant enclosure; and an electret microphone cartridge attached to said frame within said resonant enclosure so that said microphone's audio characteristics are shaped by the resonant characteristics of the resonant enclosure.
Claim 17
Independent Claim
57 words
A method of mounting a microphone, comprising the steps of: attaching a microphone cartridge to a web-like rigid frame; covering a first surface of said frame with a flexible diaphragm; and placing a loudspeaker adjacent another surface of said frame to enclose said microphone within an enclosure bounded by said diaghragm and the cone of said loudspeaker.
Claim 18
Independent Claim
57 words
A method of mounting a microphone, comprising the steps of: attaching a microphone cartridge to a web-like rigid frame; covering a first surface of said frame with a flexible diaphragm; and placing a loudspeaker adjacent another surface of said frame to enclose said microphone within an enclosure bounded by said diaghragm and the cone of said loudspeaker.
Claim 19
Dependent Claim
34 words
The method of claim 15, wherein said covering step and said placing step are accomplished by stacking said diaphragm, said frame mounted microphone and said speaker within a pocket of an electronic equipment housing.
Claim 20
Dependent Claim
19 words
The method of claim 16, further including the step of installing a gasket between said diaphragm and said frame.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |