Design and construction of a noise exposure chamber for small animals.
J Acoust Soc Am 1989 Feb; 85(2):963-966
The design and construction of a nonreverberant noise exposure chamber was described, which allows for simultaneous noise exposure of two chinchillas or other small animals. The plywood exposure chamber was lined with modeled open cell polyurethane acoustical foam. Acoustical measures were obtained with two chinchillas in the noise chamber. The chamber lining that was selected maintained homogeneity of field spectrum across all the subject locations, had a sufficiently wide bandpass for the chamber horn assembly, and allowed for minimal loading of the horn by the chamber. Sound field homogeneity was even over the 100 to 10000 hertz frequency range and free from any appreciable resonances. The test chamber had a wide enough bandpass to be used for a broad array of acoustic signals, most significantly impulsive and impact noise. Attenuation between chambers was within acceptable limits. Three additional copies of the chamber which were built from the original plans exhibited high interchamber consistency.
NIOSH-Author; Exposure-chambers; Laboratory-animals; Noise-analysis; Noise-exposure; Noise-frequencies; Noise-measurement; Sound-attenuation; Sound-propagation
Journal of the Acoustical Society of America