Thesis

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Discrimination of short frequency glides depending on reverberation

Authors Brands, B.
Year 2019
Thesis Type Bachelor's thesis
Topic Psychoacoustics
Abstract Differences in phase or group-delay are crucial properties that help the ear to discriminate between short sounds. To obtain further insights in the ability of short-time discrimination of the auditory system, a forced-choice adaptive listening experiment was performed. The subjects were exposed to chirp-like sounds varying in length, direction of the chirp and added reverberation. These chirp-like sounds were rendered by filtering test-signals with an all-pass filter with logarithmic group-delay. The group-delay was varied and the just notable difference (JND) between the logarithmic group-delay of two stimuli was measured. The results depict that by adding more reverberation, the discrimination decreased. Furthermore, upward chirp-like sounds were discriminable in a better way than downward chirp-like sounds and so were short versus long stimulus lengths. The influence of direction was only significant for short durations.
Supervisors Höldrich, R.