User selectable noise canceling for portable microphones

• US 5,268,965 A
• Filed: 04/02/1993
• Issued: 12/07/1993
• Est. Priority Date: 11/18/1991
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Badie, Merhdad, Williams, William R.
• Primary Examiner(s): Isen, Forester W.
• Application Number:
  US08/041,921
• Time in Patent Office: 249 Days
• Field of Search: 381/169, 381/170, 381/122, 381/91, 455/100
• US Class Current: 381/91
• CPC Class Codes: H04R 1/38 in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone

Abstract

Briefly, according to the invention, a noise-cancelling microphone apparatus 302 is disclosed. The microphone comprises a housing 510 and a sound transducer 502 mounted within the housing 510. The housing has first 514 and second sides 512 and the transducer 502 has first 304 and second sound ports 308 coupled to the first 514 and second sides 512 of the housing respectively. The microphone 302 also includes a mounting clip 310 coupled to one side of the housing 512 in the proximity of one of the sound ports 308. The mounting clip 310 is intended for mounting the microphone 302 to a user so as to substantially close the sound port 308 when microphone 302 is attached.

Claims

1. A noise cancelling microphone, comprising:

a housing having first and second sides;

a sound transducer mounted within the housing, the transducer having first and second sound ports coupled to the first and second sides of the housing respectively; and

mounting means coupled to one side of the housing in the proximity of the second sound port for mounting the microphone to a user so as to selectively and substantially close the second sound port when the microphone is attached to the user.

2. The noise cancelling microphone of claim 1, wherein the mounting means includes hook and loop fastener means.

3. The noise cancelling microphone of claim 1, wherein the mounting means includes a clip.

4. The noise cancelling microphone of claim 3, wherein the clip includes a pressure pad.

5. The noise cancelling microphone of claim 1, wherein the sound transducer includes a directional transducer.

6. A portable microphone apparatus adapted to be mounted on a person'"'"'s clothing, comprising:

a microphone element for converting sound waves to electrical signals, the microphone element having a first and a second port operating in combination to substantially prevent the ambient noise from being converted to electrical signals; and

fastening means attached to the portable microphone for fastening the portable microphone to the person'"'"'s clothing so as to selectively and substantially block the second port.

7. A communication device, comprising:

transmitter means for transmitting a signal;

microphone means coupled to the transmitter means for converting sound waves to electrical signals, the microphone means including;

a housing having a first and a second side;

a transducer means mounted within the housing and having a first and a second port coupled to the first and second sides of the housing respectively for substantially cancelling ambient noise;

fastening means attached to the second side of the microphone means, substantially close to the second port of the transducer, for fastening the microphone means to a person'"'"'s clothing so as to selectively block the second port.

8. The communication device of claim 7, wherein the fastening means includes hook and loop fastener means.

9. The communication device of claim 7, wherein the fastening means includes a clip.

10. The communication device of claim 7, wherein the transducer means includes a directional transducer.