电声性能时域法测量与系统辨识技术

ELECTROACOUSTIC MEASUREMENT IN TIME—DOMAIN AND SYSTEM IDENTIFICATION TECHNIQUE

传统的电声测量是在频域中进行的,随着计算机和数字信号处理技术的发展,时域法将逐渐取代频域法。本文概述了时域法的进展和系统辨识技术在电声测量中的应用,在简要介绍了最小二乘法、线性予测法和束函数法等系统辨识方法的基础上,重点介绍了全面最小二乘法及其在电声参数测量中的应用,还介绍了采用该方法测量扬声器和开口箱扬声器系统电声性能的结果,最后进行了有意义的讨论。

Traditional electroacoustic measurement is made in the frequency-domain. With the development of the computer and digital signal processing technique, the frequency-domain method will be replaced by the time-domain method. In this paper we present the various time-domain methods and the applications of the system identification technique in the electroacoustic measurement, which include the least squares method, linear prediction method and the pencil-function method, etc. Especially the total least squares (TLS) method and its application in the electroacoustic measurement are presented. We also present the measurement results which are obtained by TLS method. In addition some significant results are discussed.