Accession Number : AD0163594

Title :   Quiet Listen/Talk Adaptors for Handsets or Other Typical Phones.

Descriptive Note : Patent,

Corporate Author : OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C

Personal Author(s) : Ferrara,Peter B.

Report Date : 30 MAY 1972

Pagination or Media Count : 4

Abstract : The patent describes a sound attenuating adaptor for detachable connection to the receiver of a telephone handset consisting of a cap of resilent sound absorbing material which slips over the receiver of the handset. The cap is provided with a valve which, when the adaptor is pressed to a user's ear, deforms, causing the valve to open and permit the user to hear sound emitted from the receiver. The valve per se may be a slit in the outer end of the cap or a disc embedded therein, which slides on a tube when the cap is deformed to expose holes and allow escape of sound.

Descriptors :   (*ATTENUATORS, EARPHONES), (*PATENTS, ATTENUATORS), ADAPTERS

Subject Categories : Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE