The application of digital processing to acoustic testing

In the absence of an anechoic chamber, far-field acoustic measurements free from coloration are difficult to obtain because of environmental reverberation and background noise. This paper describes an on-line digital processing system capable of optimizing the estimate of impulse response and frequency response under such conditions. Actual measurements demonstrate that properties of the transient response which influence the quality of a transducer may be satisfactorily evaluated with such a system.