- Bliss, Donald B. and Burke, Shawn E., EXPERIMENTAL INVESTIGATION OF THE BULK REACTION BOUNDARY CONDITION.,
Journal of the Acoustical Society of America, vol. 71 no. 3
pp. 546 - 551 .
(last updated on 2007/04/09)
A local boundary condition to account for the effect of bulk reaction on the performance of sound absorbing layers was proposed by D. Bliss. The new boundary condition differs from the usual impedance boundary condition by the inclusion of an additional term involving the Laplacian of pressure taken along the surface multiplied by a complex bulk reaction coefficient, B( omega ). The present work shows that B( omega ) can be determined experimentally in a relatively straightforward manner. The experimental apparatus and the measurement procedure bear some similarity to the use of an impedance tube. The experimental results indicate that bulk reaction effects are important for Owens-Corning PF-705 Fiberglas board.