Device for intercepting received audible signals

Signals of a sonar installation are presented in audible form for detection and classification of a target. To analyse the signal, interception at lower reproduction speeds is desirable in order to be able to count periodic volume fluctuations. The invention provides a frequency-based division of the signal into two processing channels. In the first processing channel, the low-frequency component is obtained through demodulation and is stored during reproduction in a first sub-memory, preferably a RAM. In the second processing channel, the signal is clipped, sampled and stored in a second sub-memory, preferably a shift register. In a modulator connected downstream of the processing channels, the signal components which are read out at a lower, automatically adjustable reproduction speed as a read-in speed which is dependent on the frequency of the low-frequency component are combined and fed to a loudspeaker. The signal can be analysed in real time due to the automatic reproduction speed reduction.