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MOVIETONE CARD TITLE: The Sound of Tomorrow. DESCRIPTION: The RAF give a demonstration of annoyance value to representatives of the government and of airlines at home and overseas. They demonstrated the...
Pathe synopsis: Noise is said to be one of the most dangerous threats to health in the civilisation of today. Industry spends much time and money on investigating the nature and uses of sound. A leading...
Part 1: Sources and effects of noise. Nature of sound definitions of loudness and sound intensity. Causes and measurement of hearing loss. Part 2: Physical principles of sound generation and behaviour,...
COI synopsis: The ultra-modern burglar has specialised tools to break windows quietly when effecting an entry, but he’s in trouble if he reckons without ultrasound. The inaudible high frequency noises of...
COI synopsis: Gramophone records can provide a whole symphony orchestra playing the ‘1812’ on a 12-inch plastic disc thanks to stereophonic sound and microgrooves. Now, book publishers, with the...
COI synopsis: Deposits of calcium salts sometimes build up on the valves of the heart, preventing them from working properly. In the latest technique these deposits are removed with an ultrasonic probe -...
COI synopsis: A new system which uses a computer to assist in the testing of defects in loudspeakers. This system compresses the test tones played through the speakers and submits the results to computer...
COI synopsis: In the production of sound films - the separately recorded picture and sound have to be synchronised with an accuracy of two parts in 100,000 - usually requiring a mechanical or electrical link...
COI synopsis: A new motorcycle crash helmet for the police. Its built-in microphone and earpiece replace other unwieldy radio equipment, enabling an officer to transmit radio messages and receive clear...
COI synopsis: Sunken treasure? Shoals of fish? Underwater hazards? This gadget searches them all out - by sound! Using a radar-like technique you can now "see" underwater.
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Learning on Screen
Related searches have been automatically generated using the OpenCalais semantic analysis service.Related searches have been automatically generated using the OpenCalais semantic analysis service.