Silence machine

Silence machine

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Credit: COLIN CUTHBERT/SCIENCE PHOTO LIBRARY

Caption: Silence machine. This ECASS (Electronic Controlled Acoustic Shadow System) is designed to cancel out unwanted sounds. This machine, like other silence machines, uses a computer to analyse the noise and generate a reverse sound to cancel out the original noise. The ECASS improves on other silence machines in that it can be used outdoors as well as indoors. It also casts its acoustic shadow over a wider area. Its projected cost is cheaper than conventional noise reduction methods. The ECASS is being developed by Professor Selwyn Wright at the University of Huddersfield, UK. Photographed in 2002.

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Keywords: acoustic shadow system, acoustics, audio sound, britain, british, cancellation, communication, communications, computer, computing, control, destructive interference, ecass, electronic, electronic controlled, electronics, engineering, england, english, noise, pollution, quiet, research, selwyn, silence machine, technology, uk, united kingdom, university of huddersfield, wright

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