Ultrasonic vibration generates a sensation of sound via bone-conduction. This phenomenon is called bone-conducted ultrasonic (BCU) hearing. Complex sounds can also be perceived by amplitude-modulating a BCU stimulus (AM-BCU). The influence of the modulation frequency on the sensitivity to detecting amplitude modulation of sinusoidal carriers of 10, 20, and 30 kHz was examined to clarify the characteristics of the perception of amplitude modulation over the sonic or audio-frequency range and the ultrasonic range. In addition, the detection sensitivity for single-sideband modulation for a 20 kHz carrier was measured. Temporal modulation transfer functions (TMTFs) obtained at each carrier frequency suggest that the auditory system has the ability to process timing information in the envelopes of AM-BCUs at lower modulation frequencies, as is the case with audio-frequency sounds. The possible influence of peripheral filtering on the shape of the TMTF at higher frequencies was examined.
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November 2010
November 24 2010
Modulation detection for amplitude-modulated bone-conducted sounds with sinusoidal carriers in the high- and ultrasonic-frequency range
Takuya Hotehama;
Takuya Hotehama
Japan Society for the Promotion of Science (JSPS),
National Institute of Advanced Industrial Science and Technology (AIST)
, 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
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Seiji Nakagawa
Seiji Nakagawa
a)
National Institute of Advanced Industrial Science and Technology (AIST)
, 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
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a)
Author to whom correspondence should be addressed. Electronic mail: s-nakagawa@aist.go.jp
J. Acoust. Soc. Am. 128, 3011–3018 (2010)
Article history
Received:
June 22 2009
Accepted:
August 25 2010
Citation
Takuya Hotehama, Seiji Nakagawa; Modulation detection for amplitude-modulated bone-conducted sounds with sinusoidal carriers in the high- and ultrasonic-frequency range. J. Acoust. Soc. Am. 1 November 2010; 128 (5): 3011–3018. https://doi.org/10.1121/1.3493421
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