As active noise control systems begin to penetrate the market place, are the days of the passive attenuator numbered? Andrew Brister looks at the likely future for anti-noise.
The sound of silence.
![](https://www.aivc.org/sites/default/files/default_images/default_image_5.png)
Year:
1993
Bibliographic info:
UK, Building Services, July 1993, pp 43-44