DEVICE FOR MONITORING ACOUSTIC SIGNAL PROCESSING SYSTEMS

摘要

The device described has the following features: the device has a first input terminal to which is applied the input signal of the acoustic signal processing system to be monitored, a second input terminal to which is applied the output signal of the system, and a signal processor. The signal processor calculates, by correlation between the two signals present at the two input terminals, the signal delay time of the system to be monitored. The signal processor continuously produces the difference signal from the signal present for a given time interval at the first input terminal and the signal present later at the second input terminal after the signal delay time. The signal processor calculates the spectral composition of the signal present at the first input terminal during the given time interval and the corresponding difference signal. The signal processor calculates the threashold of hearing of a human ear from the spectral composition of the signal present at the first input terminal and compares it with the corresponding difference signal.