Predicting Aural Detectability of Aircraft in Noise Backgrounds
Final technical rept. Jan-Dec 1971
BOLT BERANEK AND NEWMAN INC CANOGA PARKCA
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Laboratory experiments were undertaken to develop improved aural detection criteria for light aircraft. Specifically two series of psychoacoustic judgment tests were conducted to determine the applicability of the psychophysical Theory of Signal Detectability TSD to prediction of the aural detectability of light aircraft noise signatures in jungle noise backgrounds. The first series of tests produced data supporting development of a simplified graphical prediction method based on TSD. The second testing program validated the precision and accuracy of the prediction method under quasi-realistic listening conditions. Predicted levels of performance were typically within one or two dB of the data averaged for all observers.