Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Thermal response to – or generation of – sound vibration
Patent
1991-09-09
1992-08-11
Dwyer, James L.
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Thermal response to, or generation of, sound vibration
381183, 381187, 381168, 12820119, 2422, H04R 2500, A62B 1808, A42B 124
Patent
active
051386666
ABSTRACT:
The invention provides a combined microphone and amplifier assembly that is releasably connected to the voice emitter passage of a conventional face mask without requiring any penetration or structural modification of the face mask including the voice emitter passage of the mask. The combined microphone and amplifier assembly includes a body mounting and enclosing within a main compartment an amplifier circuit board and a speaker. The body further includes one or more battery compartments having selectively removable covers which afford ready access to the batteries contained within the compartments. Connected to the body is a mounting bracket that facilitates the quick and easy releasable connection of the combined microphone and amplifier assembly to the mask without any penetration or structural modification of the mask being required.
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Bauer Alfred
Dobbins Thomas A.
Actron Manufacturing Company
Chan Jason
Dwyer James L.
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