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