Title :
Application of cepstrum techniques to the measurement of the normal incident sound absorption coefficient of road surfaces in-situ
Author_Institution :
Central Acoustics Lab., Cape Town Univ., Rondebosch, South Africa
Abstract :
The measurement of the absorption coefficient of a surface is described whereby the surface is insonified with a suitable sound signal and the echo is extracted from the total signal received by a microphone placed close to the surface by means of cepstral extraction, or homomorphic deconvolution. Although the principle is relatively simple certain practical problems are described which influence the accuracy of the results
Keywords :
acoustic noise measurement; acoustic signal processing; cepstral analysis; microphones; road traffic; accuracy; cepstral extraction; cepstrum techniques; echo; homomorphic deconvolution; microphone; normal incident sound absorption coefficient; road surfaces; road traffic noise; sound signal; Absorption; Acoustic measurements; Acoustic noise; Building materials; Cepstrum; Cities and towns; Laboratories; Loudspeakers; Pollution measurement; Roads;
Conference_Titel :
Communications and Signal Processing, 1993., Proceedings of the 1993 IEEE South African Symposium on
Conference_Location :
Jan Smuts Airport
Print_ISBN :
0-7803-1292-9
DOI :
10.1109/COMSIG.1993.365879
