THE DETECTION THRESHOLDS OF RESONANCES AT LOW-FREQUENCIES

New experimental data on the detection thresholds of low-frequency res onances and antiresonances are presented. Using an adaptive procedure known as the up-dawn transformed response (UDTR) rule, the 70.7% detec tion thresholds were measured for a single added resonance (peak and n otch) for different Q values and center frequencies. The signals inclu ded pink noise and pulses auditioned through earphones. The results sh ow that detection thresholds are affected in complicated ways by Q, ce nter frequency, and signal type. This makes their detection difficult to predict using current hearing models and frequency response measure ments.