Sound system for America
Page 18
If you've noticed an error in this article please click here to report it so we can fix it.
SOUND ATTENUATORS of Colchester has reached an agreement with an American company, International Technology and Electronics, whereby the US firm will have the right to use a Sound Attenuators noise control system called aetive noise control (aria
The deal is expected to be worth $1.5m over five years.
Unwanted sound waves are monitored by a microphone and an exact opposite waveform is radiated through carefully-positioned loudspeakers.
The result is a dramatic noise reduction.
One of the major problems that had to be solved in the development of the anc system was the speed of reaction that was needed from the noise monitoring and generating equipment.
Much of the development work has been done at the Electrical Engineering Department of Essex University by Professor Barrie Chaplin.
Sound Attenuators has established a new company called Contranoise to exploit the potential of active noise control. The most likely applications are in areas where noise and vibration is of a repetitive nature. That includes diesel engined commercial vehicles.