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Basic Aspects of HearingPhase Discrimination Ability in Mongolian Gerbils Provides Evidence for Possible Processing Mechanism of Mistuning Detection

Basic Aspects of Hearing: Phase Discrimination Ability in Mongolian Gerbils Provides Evidence for... [Compared to humans, Mongolian gerbils (Meriones unguiculatus) are much more sensitive at detecting mistuning of frequency components of a harmonic complex (Klinge and Klump. J Acoust Soc Am 128:280–290, 2010). One processing mechanism suggested to result in the high sensitivity involves evaluating the phase shift that gradually develops between the mistuned and the remaining components in the same or separate auditory filters. To investigate if this processing mechanism may explain the observed sensitivity, we determined the gerbils’ thresholds to detect a constant phase shift in a component of a harmonic complex that is introduced without a frequency shift. The gerbils’ detection thresholds for constant phase shifts were considerably lower for a high-frequency component (6,400 Hz) than for a low-frequency component (400 Hz) of a 200-Hz harmonic complex and increased with decreasing stimulus duration. Compared to the phase shifts calculated from the mistuning detection thresholds, the detection thresholds for constant phase shifts were similar to those for gradual phase shifts for the low-frequency harmonic but considerably lower for the high-frequency harmonic. A simulation of the processing of harmonic complexes by the gerbil’s peripheral auditory filters when components are phase shifted shows waveform changes comparable to those assessed for mistuning detection Klinge and Klump (J Acoust Soc Am 128:280–290, 2010) and provides evidence that detection of the gradual phase shifts may underlie mistuning detection.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Basic Aspects of HearingPhase Discrimination Ability in Mongolian Gerbils Provides Evidence for Possible Processing Mechanism of Mistuning Detection

Part of the Advances in Experimental Medicine and Biology Book Series (volume 787)
Editors: Moore, Brian C. J.; Patterson, Roy D.; Winter, Ian M.; Carlyon, Robert P.; Gockel, Hedwig E
Klinge-Strahl, Astrid; Parnitzke, Timo; Beutelmann, Rainer; Klump, Georg M.
Basic Aspects of Hearing — Apr 16, 2013
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References (17)

Publisher
Springer New York
Copyright
© Springer Science+Business Media New York 2013
ISBN
978-1-4614-1589-3
Pages
399–407
DOI
10.1007/978-1-4614-1590-9_44
Publisher site
See Chapter on Publisher Site

Abstract

[Compared to humans, Mongolian gerbils (Meriones unguiculatus) are much more sensitive at detecting mistuning of frequency components of a harmonic complex (Klinge and Klump. J Acoust Soc Am 128:280–290, 2010). One processing mechanism suggested to result in the high sensitivity involves evaluating the phase shift that gradually develops between the mistuned and the remaining components in the same or separate auditory filters. To investigate if this processing mechanism may explain the observed sensitivity, we determined the gerbils’ thresholds to detect a constant phase shift in a component of a harmonic complex that is introduced without a frequency shift. The gerbils’ detection thresholds for constant phase shifts were considerably lower for a high-frequency component (6,400 Hz) than for a low-frequency component (400 Hz) of a 200-Hz harmonic complex and increased with decreasing stimulus duration. Compared to the phase shifts calculated from the mistuning detection thresholds, the detection thresholds for constant phase shifts were similar to those for gradual phase shifts for the low-frequency harmonic but considerably lower for the high-frequency harmonic. A simulation of the processing of harmonic complexes by the gerbil’s peripheral auditory filters when components are phase shifted shows waveform changes comparable to those assessed for mistuning detection Klinge and Klump (J Acoust Soc Am 128:280–290, 2010) and provides evidence that detection of the gradual phase shifts may underlie mistuning detection.]

Published: Apr 16, 2013

Keywords: Phase Shift; Stimulus Duration; Mongolian Gerbil; Reference Stimulus; Pink Noise

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