Abstract
This paper considers how the listening scores obtained for audio signals
and psychological impressions for speech audibility change when factors
such as hearing loss due to aging are taken into account. Concretely,
frequency filters for simulating hearing loss due to factors such
as aging are first prepared. Next, psychological listening experiments
are conducted in which both the audio signal and the noise passing
through the above-mentioned filters are transmitted to subjects with
normal hearing. Using the observed experimental data, the relationships
between the weighted-mean spectral distance and the listening scores
of the audio signals and psychological impressions with respect to
speech audibility are investigated. Next, based on these relationships,
problems associated with the prediction of listening scores of audio
signals and psychological impressions with respect to speech audibility
are discussed. The predicted results are in good agreement with the
observed values.
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