Discrimination of starting phase with sinusoidal envelope modulation | Zendy

Stanley Sheft | Zendy; William A. Yost | Zendy

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Discrimination of starting phase with sinusoidal envelope modulation

Author(s) -

Stanley Sheft,

William A. Yost

Publication year - 2007

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.2430766

Subject(s) - modulation (music) , envelope (radar) , amplitude modulation , acoustics , phase (matter) , amplitude , wideband , noise (video) , frequency modulation , work (physics) , phase modulation , computer science , physics , mathematics , telecommunications , optics , bandwidth (computing) , artificial intelligence , radar , quantum mechanics , image (mathematics) , thermodynamics

Modulation-filterbank models discard phase information above very low rates of amplitude modulation (AM). The present work evaluated this restriction by measuring thresholds for discriminating the starting phase of sinusoidal modulators of wideband-noise carriers. Results showed a low-pass characteristic with some listeners unable to perform the task once the modulation rate was greater than 12.5 Hz. For others, however, thresholds were obtained with AM rates of up to one to two octaves higher. Intersubject variability may in part relate to the presence of multiple discrimination cues, with only some based on comparison of the ongoing pattern of envelope fluctuation.

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