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A Psychoacoustic Measurement and ABR for the Sound Signals in the Frequency Range Between 10 kHz and 24 kHz

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In high definition audio media such as SACD and DVD-audio, wide frequency range far beyond 20 kHz is used. However, the auditory characteristics for the frequencies higher than 20 kHz have not been necessarily understood. At the first step to make clear the characteristics, we conducted a psycho-acoustic and a auditory brain-stem response(ABR) measurement for the sound signals in the frequency range between 10 kHz and 24 kHz. At the frequency of 22 kHz, the minimum hearing threshold in the psycho-acoustic measurement was 80 dB. At the frequency of 22 kHz, the thresholds of 100 dB in the ABR measurement could be measured for 1 of the 5 subjects.

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