TY  - JOUR
PY  - 1999//
TI  - Broadband performance of an active headrest
JO  - Journal of the Acoustical Society of America
A1  - Rafaely, B.
A1  - Elliott, S. J.
A1  - Garcia-Bonito, J.
SP  - 787
EP  - 793
VL  - 106
IS  - 2
N2  - This paper presents a study of the attenuation of broadband random acoustic disturbances, when using a feedback active headrest system, as originally suggested by Olson and May. Previous studies showed that a practical active headrest can be designed for tonal disturbances using feedforward controllers. However, many applications, such as jet aircraft and cars, require feedback systems to control random disturbances over a wide frequency bandwidth. In this work, robust feedback controllers are designed to control broadband random disturbances in the low-frequency range based on measured data from a laboratory headrest system. The results show that a practically useful performance can be achieved, but only if the controller is designed to minimize the pressure at a "virtual microphone" close to the listener's ears, and that the performance is maintained reasonably well with movements of the listener's head. The paper emphasizes the importance of both the acoustics and the control in the design of broadband active headrest systems.<p /> <p>Language: en</p>
LA  - en
SN  - 0001-4966
UR  - http://dx.doi.org/
ID  - ref1
ER  -