Abstract
This paper is concerned with the determination of the auditory filter
shape using the notched noise method with noise bands symmetrically
located above and below a probe frequency of 10 kHz. Unlike in the
classical experiments conducted with the use of Patterson method the
levels as well as power spectrum densities of the lower and upper
component bands of the notched noise masker were not the same and were set
such as to produce the same amount of masking at the 10-kHz frequency. The
experiment consisted of three conditions in which the following values
were determined: (I) the detection threshold for a 10-kHz probe tone in
the presence of a noise masker presented below the tone’s frequency; (II)
the level of a noise masker presented above the 10-kHz probe tone
frequency, at which the masker just masked the probe tone, (III) the
detection threshold for a probe tone in the presence of a notched-noise
masker. The data show a considerable amount of variability across the
subjects, however, the resulting frequency characteristics of the auditory
filters are consistent with those presented in the literature so that the
Equivalent Rectangular Bandwidth is less than 11% of their centre
frequency.
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