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JACIII Vol.21 No.2 pp. 342-349
doi: 10.20965/jaciii.2017.p0342
(2017)

Paper:

An Attempt to Improve Food/Sound Congruity Using an Electromyogram Pseudo-Chewing Sound Presentation System

Hiroshi Endo, Hidekazu Kaneko, Shuichi Ino, and Waka Fujisaki

Human Informatics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
Central 6, 1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan

Received:
August 26, 2016
Accepted:
December 7, 2016
Online released:
March 15, 2017
Published:
March 20, 2017
Keywords:
chewing sound, food texture, food/sound congruity, electromyography, elderly person
Abstract
Improving the texture of foods provided during nursing care is necessary to improve the appetite of elderly individuals. We developed a system to vary perceived food texture using pseudo-chewing sounds generated from electromyogram (EMG) signals. However, this previous system could not provide chewing sounds that were sufficiently congruous with foods. Because food/sound combinations that seem unnatural cause individuals to feel uncomfortable with pseudo-chewing sounds, food/sound congruity is important. This research aims to improve the derivation and presentation of pseudo-chewing sounds so as to be able to provide various kinds of chewing sounds. The developed system adjusts the volume of pseudo-chewing sounds that are stored in a digital audio player based on the amplitude of the EMG signal envelope. Using this system, food/sound congruity was examined with two kinds of softened Japanese pickles. Six kinds of pseudo-chewing sounds were tested (noisy chewing sound, EMG chewing sound, and four kinds of actual chewing sounds: rice cracker, cookie, and two kinds of Japanese pickles). Participants reported that food/sound combinations were unnatural with the noisy and EMG chewing sounds, whereas the combinations felt more natural with the pseudo-chewing sounds of Japanese pickles. We concluded that the newly developed system could effectively reduce the unnatural feeling of food/sound incongruity.
Cite this article as:
H. Endo, H. Kaneko, S. Ino, and W. Fujisaki, “An Attempt to Improve Food/Sound Congruity Using an Electromyogram Pseudo-Chewing Sound Presentation System,” J. Adv. Comput. Intell. Intell. Inform., Vol.21 No.2, pp. 342-349, 2017.
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