Low cost hearing protection device

Details Low cost hearing protection device Low cost hearing protection device

2005-11-29

2005-11-29

Le, Huyen (Department: 2643)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Plural or compound reproducers

C381S102000, C381S106000, C381S107000

Reexamination Certificate

active

06970571

ABSTRACT:
An earmuff comprising a headpiece and a circuit. The headpiece supports the earmuff on the head of an individual. The circuit has an input device for receiving external sound energy and converting the external sound energy to electrical sound signals.

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patent: 2001/0046304 (2001-11-01), Rast

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