Now showing items 1-3 of 3
Acoustic performance of a stretched membrane and porous blanket combination
(Acoustical Society of America, 1976)
The sound absorption performance of an acoustic absorber consisting of a stretched circular membrane placed a short distance in front of a fiberglass blanket was both measured and predicted. Both theoretical and experimental ...
A broadband passive-active sound absorption system
(Acoustical Society of America, 1999-11-01)
In recent years, hybrid absorption systems have been implemented which achieve high sound absorption over a broad frequency range. This work is an experimental study of a broadband hybrid absorption system which is comprised ...
A new hybrid passive/active noise absorption system
(Acoustical Society of America, 1997-03-01)
A new hybrid passive/active system is developed for sound absorption over a wide frequency range. The system is comprised of a layer of absorbing material positioned at a distance from an active wall, leaving an air space. ...