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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/10822

Title: Study on detectability of signals by utilizing differences in their amplitude modulation
Authors: Yano, Yuta
Miyauchi, Ryota
Unoki, Masashi
Akagi, Masato
Issue Date: 2012-03-06
Publisher: 2012 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'12)
Magazine name: 2012 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'12)
Start page: 611
End page: 614
Abstract: Auditory search experiments were conducted to investigate the detectability of targets with regard to movements in temporal envelopes. The movements in the temporal envelopes of signals were defined as the mean value of slopes, i.e., the first order approximation of the temporal envelopes. The movements were systematically controlled by band-pass filtering on the modulation spectrum of the signals. The movements that we used in the experiments were 44, 154, 264, 374, 484, 594, and 704 mV/s. The movements of target signals were set at 264, 374, 484 mV/s. The movements of background signals in each target were set to be different from the movements between target and background signals. Stimuli were composed of different temporal envelopes with a noise carrier. 1/2-octave band-noise as a carrier was used in which the center frequency of the carrier was 1380 Hz. The results obtained from auditory search experiments demonstrated that the detectability of each target signal could be improved when the movements of the target and background signals differed. The results revealed that the difference in the movements of the temporal envelopes of signals affected the detectability of the signals.
Rights: This material is posted here with permission of the Research Institute of Signal Processing Japan. Yuta Yano, Ryota Miyauchi, Masashi Unoki, and Masato Akagi, 2012 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'12), 2012, pp.611-614.
URI: http://hdl.handle.net/10119/10822
Material Type: publisher
Appears in Collections:b11-1. 会議発表論文・発表資料 (Conference Papers)

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