Surgery – Respiratory method or device – Means for transmitting – or facilitating – voice communication...
Patent
1985-10-23
1988-07-12
Coven, Edward M.
Surgery
Respiratory method or device
Means for transmitting, or facilitating, voice communication...
12820712, A62B 1808
Patent
active
047563087
ABSTRACT:
A protective breathing mask, in addition to having a speaking diaphragm for close communication is equipped with an electroacoustic transducer system for indirect speech transmission from inside the mask. In order to achieve high transmission quality for human speech with a simple apparatus without the occurrence of interference noise, it is provided that the sound output channel is closed on the mask side by an auxiliary diaphragm which is acoustically coupled with the speaking diaphragm via a secondary air chamber, and is also mechanically connected directly or indirectly with a movable element of the electroacoustic transducer system.
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AKG Akustische u.Kino-Gerate Gesellschaft m.b.H.
Coven Edward M.
Reichle K. M.
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