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H6 - Federal Item Name Directory
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00359
MICROPHONE,CARBON
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FIIG: A06400
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Entry Date: Apr-01-1974
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Concept: 1
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Status: A
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Applicability: B
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Type: 0
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Definition: A microphone which depends for its operation upon the variation in resistance of carbon granules.
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Basic INC: 70176
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Basic Name: MICROPHONE
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Description: 1. An electroacoustic transducer that responds to sound waves and delivers essentially equivalent electric waves. It may be either: (1) pressure type-a device specifically designed for converting instantaneous sound pressure waves into corresponding electrical variations; (2) velocity type-a device specifically designed for converting instantaneous particle velocity in the impressed sound wave into corresponding electrical variations.
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Corresponding NIINs: 65
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