Acoustic reflex and critical bandwidth

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Abstract
The threshold of the acoustic reflex was measured with an electroacoustic impedance bridge in six subjects with normal hearing sensitivity. Reflex thresholds were measured as a function of the bandwidth (1, 10, 30, 100, 300, 1155, 2042 Hz) of an acoustic stimulus centered around 1 kHz, and also for broad‐band noise (5780‐Hz bandwidth). Acoustic‐reflex thresholds were relatively constant for bandwidths between 1 and 300 Hz, and became progressively lower as the bandwidth increased (1155, 2042, 5780 Hz). The data support the idea that there is a critical‐band mechanism operating for elicitation of the acoustic reflex, and that the critical bandwidth for the acoustic reflex at 1 kHz is substantially wider than that observed in psychophysical studies.

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