Noise suppressing filter for microphone
United States Patent 3154171
US Patent References:
Microphone sound filter
- - 2536261
Microphone waterproofing device
- - 2556168
Electroacoustic transducer
- - 3014099
Method of molding open pore isocyanate foam
- - 3016575
Pipe microphone
- - 3053339
Microphone sound filter
- - 2536261
Microphone waterproofing device
- - 2556168
Electroacoustic transducer
- - 3014099
Method of molding open pore isocyanate foam
- - 3016575
Pipe microphone
- - 3053339
Inventors:
Knutson, Oliver J.
Graber, Armin E.
Wandell Jr., Wilbur H.
Graber, Armin E.
Wandell Jr., Wilbur H.
Publication Date:
10/27/1964
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Export Citation:
Assignee:
VICON INSTR COMPANY
Primary Class:
Other Classes:
181/242, 381/368
International Classes:
H04R1/08