Measurement signals for an acoustical impulse response

Measurement signals for an acoustical impulse response Yutaka KANEDA Graduate School of Engineering, Tokyo Denki University 5 Senju-asahi-cho, Adachi-ku, Tokyo 120-8551, Japan E-mail: kaneda@c.dendai.ac.jp Abstract Various signals such as a time-stretched pulse and a maximum length sequence have been proposed for measuring an acoustical impulse response. In this paper, it is shown that the measurement error due to environmental noise and system nonlinearity depends on the measurement signal characteristics, including the signal waveform, power spectrum and reproduced sound level. Since the error that can be tolerated depends on the application of the impulse response, guidelines for the selection of measurement signals for different applications should be established.