When sinusoidal electric stimulation is applied to the intact cochlea, a frequency-specific acoustic emission can be recorded in the ear canal. Acoustic emissions are produced by basilar membrane motion, and have been used to suggest a corresponding acoustic sensation termed “electromotile hearing.” Electromotile hearing has been specifically attributed to electric stimulation of outer hair cells in the intact organ of Corti. To determine the nature of the auditory perception produced by electric stimulation of a cochlea with intact outer hair cells, guinea pigs were tested in a psychophysical task. First, subjects were trained to report detection of sinusoidal acoustic stimuli and dynamic range was assessed using response latency. Subjects were then implanted with a ball electrode placed into scala tympani. Following the surgical implant procedure, subjects were transferred to a task in which acoustic signals were replaced by sinusoidal electric stimulation, and dynamic range was assessed again. Finally, the ability of acoustic pure-tone stimuli to mask the detection of the electric signals was assessed. Based on the masking effects, it is concluded that sinusoidal electric stimulation of the intact cochlea results in perception of a tonal (rather than a broadband or noisy) sound at a frequency of or above.
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December 2006
December 01 2006
Electromotile hearing: Acoustic tones mask psychophysical response to high-frequency electrical stimulation of intact guinea pig cochlea)
Colleen G. Le Prell;
Colleen G. Le Prell
c)
Kresge Hearing Research Institute
, 1301 East Ann Street, Ann Arbor, Michigan 48109-0506
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Kohei Kawamoto;
Kohei Kawamoto
d)
Kresge Hearing Research Institute
, 1301 East Ann Street, Ann Arbor, Michigan 48109-0506
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Yehoash Raphael;
Yehoash Raphael
Kresge Hearing Research Institute
, 1301 East Ann Street, Ann Arbor, Michigan 48109-0506
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David F. Dolan
David F. Dolan
Kresge Hearing Research Institute
, 1301 East Ann Street, Ann Arbor, Michigan 48109-0506
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c)
Author to whom correspondence should be addressed; electronic mail: [email protected]
d)
Current mailing address: Department of Otolaryngology, Kansai Medical University, 10-15 Fumizonocho, Moriguchi, Osaka, 570-8506, Japan.
a)
Portions of this research were presented at the Midwinter Meetings of the Association for Research in Otolaryngology (for abstracts, see Le Prell et al., 2000; 2002).
J. Acoust. Soc. Am. 120, 3889–3900 (2006)
Article history
Received:
January 05 2006
Accepted:
September 11 2006
Citation
Colleen G. Le Prell, Kohei Kawamoto, Yehoash Raphael, David F. Dolan; Electromotile hearing: Acoustic tones mask psychophysical response to high-frequency electrical stimulation of intact guinea pig cochle. J. Acoust. Soc. Am. 1 December 2006; 120 (6): 3889–3900. https://doi.org/10.1121/1.2359238
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