Electrical audio signal processing systems and devices – Hearing protectors – electrical
Patent
1987-05-08
1990-05-08
Ng, Jin F.
Electrical audio signal processing systems and devices
Hearing protectors, electrical
381 71, 381 94, 381158, 381187, 181129, H04R 110, H04R 128
Patent
active
049245023
ABSTRACT:
In a hearing device, such as a circumaural earmuff cup or a circumaural earphone cup, either of which comprises an earpad assembly in contact with the external ear, through which sound is conducted to the external ear for the purpose of providing at the eardrum a sound pressure having a prescribed ratio with respect to the sound pressure at a source, the invention comprising a predetermined sound leakage path through said earpad assembly, to reduce the variable in said ratio, that is customarily encountered caused by the variations in the shape of the external ear from one user to another and by variations in position and force of contact of the earpad resting against the pinna.
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Allen Clayton H.
Berger Elliott H.
Byrd Danita R.
Ng Jin F.
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