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File:U.S. Navy Operations Specialist 3rd Class Gage Crabtree communicates through a sound-powered telephone while standing watch on the bridge of the amphibious command ship USS Blue Ridge (LCC 19) as the ship
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A Sailor uses a sound-powered phone during a drill. | Flickr
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DVIDS - Images - U.S. Sailor communicates using a sound-powered telephone [Image 9 of 20]
S7600 Sound-Powered Series Headset
US Navy Handsets and Headsets for Radio Communications
Headset Type Marine Sound Powered Telephone Batteryless Telephone - China Telephone, Marine Telephone | Made-in-China.com
NEW DAVID CLARK 12511G-01 SOUND POWERED HEADSET W/ ACOUSTIC BOOM H5030 *READ* | eBay
A landing signal officer uses a sound-powered telephone headset during flight operations aboard the nuclear-powered aircraft carrier USS DWIGHT D. EISENHOWER (CVN 69) - NARA & DVIDS Public Domain Archive Public Domain
The Reliability of Sound-Powered Phone Systems | Naval History Magazine - February 2021 Volume 35, Number 1