DETECTION OF AUDITORY WARNING SIGNALS IN THE PRESENCE OF INDUSTRIAL NOISE

摘要

1. The initial experiments show that warning signal detection is influenced by the temporal structure ofsignal in greater degree than its spectral structure.2. The differences between normalized detection thresholds for signals of various temporal structures reach10 dB (Fig. 4). The lowest detection thresholds were obtained for tone pulses of 0.2 Hz repetitionfrequency and 25% duty cycle. For the signals with 75’ZOduty cycle and 0.2 Hz repetition frequency thehighest thresholds were observed.3. For signals with different spectral structures detection threshold level differences (Fig. 5) do not exceed4 dB. In the five investigated cases the lowest detection thresholds were obtained for sweep signals.4. It seems preferable to fmus on optimal temporal structure in further investigations.