초록 ▼

A transducer rendered operative by a battery voltage source is mounted on and closely spaced from a sonic radiating surface by a sonic coupling body to which a housing is secured in enclosing relation to both the transducer and the battery source. Openings in the housing expose a volume control knob

A transducer rendered operative by a battery voltage source is mounted on and closely spaced from a sonic radiating surface by a sonic coupling body to which a housing is secured in enclosing relation to both the transducer and the battery source. Openings in the housing expose a volume control knob and an output signal jack through which a signal cable connects the transducer to a remotely located amplifier.

대표청구항 ▼

In combination with an electrically powered condenser microphone, a power source rendering the microphone operative to generate an output signal in response to detection of sonic vibration of a radiating surface, and an elastomeric body removably mounted in contact with said surface holding the micr

In combination with an electrically powered condenser microphone, a power source rendering the microphone operative to generate an output signal in response to detection of sonic vibration of a radiating surface, and an elastomeric body removably mounted in contact with said surface holding the microphone in spaced relation thereto, the improvement comprising coupling means directly mounting the microphone in the body for direct coupled vibration transmission between the radiating surface and the microphone and a housing directly secured to said body and enclosing a protective chamber and means mounting the power source within the chamber of the housing in non-isolated relation to the microphone.