Group delay distortions in electroacoustical systems
Jens P. Blauert, Priscilla W. Laws · The Journal of the Acoustical Society of America · 1978
We report on measurements of group delay distortions introduced into electroacoustical transmission by the fact that earphones and loudspeakers are not necessarily minimum phase systems. Psychoacoustical tests show further that the measured distortions can approach the magnitude of the threshold of perceptibility, but in most cases will be well below this value.