Safeguarding test signals for acoustic measurement using arbitrary sounds: Measuring impulse response by playing music

Acoustical science and technology

article

Hideki Kawahara¹  Kohei Yatabe² 

[1] Wakayama University;Waseda University

关键词: Discrete Fourier transformation;    Periodic signal;    Impulse response;    Spurious responses;    Entertaining test sounds;    Loop music;   

DOI  :  10.1250/ast.43.209

学科分类：声学和超声波

来源: Acoustical Society of Japan

【 摘 要 】

We propose a simple method of measuring acoustic responses using any sound by converting them to be suitable for measurement. This method enables us to use music pieces for measuring acoustic conditions. It is advantageous to measure such conditions using test sounds that do not annoy the listeners. In addition, applying the underlying idea of the simultaneous measurement of multiple paths [1,2] provides features of practical value. For example, it is possible to measure deviations (temporally stable, random, and timevarying) and the impulse response while reproducing slightly modified contents under target conditions. The key idea of the proposed method is to add relatively small deterministic signals that sound like noise to the original sounds. We call the converted sounds as safeguarded test signals.

【 授权许可】

Unknown