一种波形可控的脉冲声源研制  

A Method to Develop a Digitally-controlled Sound Impulse Generator

作　　者：徐士化[1] 侯宏[1] 

机构地区：[1]西北工业大学航海学院,陕西西安710072

出　　处：《电声技术》2007年第2期9-13,共5页Audio Engineering

基　　金：西北工业大学青年科技创新基金资助;西北工业大学研究生创业种子基金资助(Z200505)

摘　　要：脉冲回波方法是近年来较为常用的现场吸声测量技术,根据不同的测量原理,需要声源辐射特定的脉冲声信号。研究了一种可控脉冲声生成技术,介绍了声源设计方案以及脉冲声工作生成的主要原理。通过实验测量,该声源能够辐射需要的波形和不同长度的脉冲声信号,可用于时域现场吸声测量技术中。The echo impulse method is used to be the in-situ sound absorption measurement recent years. Some special sound pulses are needed in the echo-impulse absorption measurement technique. Including the principles and the source design, a method of digitally-controlled sound impulse generator is introduced. The kinds of sound impulse, which are single sinusoid, single damp-sinusoid and differential Gaussian pulse, are successfully generated by the impulsive sound source. These sound impulses can be used to the in-situ sound absorption measurement.

关 键 词：吸声测量 脉冲声源 脉冲回波 

分 类 号：TB52[理学—物理]