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P C Werth Soundfield uses a lightweight, wireless microphone to transmit a teacher's voice to a special base-station. This then amplifies and enhances speech frequencies and broadcasts from car...

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HOYLES ELECTRONIC DEVELOPMENTS LTD
Founded in 1965 by ex-fireman, Jack Hoyle, Hoyles Electronic is a family business known and respected for the design and manufacture of niche fire, safety and security equipment. All Hoyles produc...
 
Werth, P C Ltd
P C Werth Soundfield uses a lightweight, wireless microphone to transmit a teacher's voice to a special base-station. This then amplifies and enhances speech frequencies and broadcasts from car...