Abstract
The availability of the BSR for assessing hearing thresholds at speech frequencies was studied by using a “selective masking”. Auditory stimuli consisted of 500Hz, 1kHz and 2kHz tone pips with 5msec rise and 5msec decay without a plateau. Several different maskings were applied using unfiltered weighted noise (B), 1800Hz highpass noise (C), 900Hz high-pass noise (D), 450Hz high-pass noise (E), 450-560Hz band-pass noise (F) and 900-1120Hz band-pass noise (G).
Thresholds of the BSR at 500Hz, 1kHz and 2kHz were measured without masking (A) and then with varied masking noises (B-G). At each masking condition, thresholds obtained from BSR tests corresponded well to those from pure tone audiometry.
The “BSR audiometry” appeared to be useful for the determination of hearing thresholds at frequencies of 500Hz, 1kHz and 2kHz.
