scholarly journals Effects of low-frequency biasing on spontaneous otoacoustic emissions: Frequency modulation

2008 ◽  
Vol 124 (5) ◽  
pp. 3009-3021 ◽  
Author(s):  
Lin Bian
Keyword(s):  
Frequency Modulation ◽  
Otoacoustic Emissions ◽  
Low Frequency ◽  
Spontaneous Otoacoustic Emissions

scholarly journals Low-frequency sound affects active micromechanics in the human inner ear

2014 ◽  
Vol 1 (2) ◽  
pp. 140166 ◽  
Author(s):  
Kathrin Kugler ◽  
Lutz Wiegrebe ◽  
Benedikt Grothe ◽  
Manfred Kössl ◽  
Robert Gürkov ◽  
...  
Keyword(s):  
Inner Ear ◽  
Hair Cells ◽  
Otoacoustic Emissions ◽  
Low Frequency ◽  
Short Exposure ◽  
Low Frequencies ◽  
Spontaneous Otoacoustic Emissions ◽  
Human Cochlea ◽  
Human Hearing ◽  
The Impact

Noise-induced hearing loss is one of the most common auditory pathologies, resulting from overstimulation of the human cochlea, an exquisitely sensitive micromechanical device. At very low frequencies (less than 250 Hz), however, the sensitivity of human hearing, and therefore the perceived loudness is poor. The perceived loudness is mediated by the inner hair cells of the cochlea which are driven very inadequately at low frequencies. To assess the impact of low-frequency (LF) sound, we exploited a by-product of the active amplification of sound outer hair cells (OHCs) perform, so-called spontaneous otoacoustic emissions. These are faint sounds produced by the inner ear that can be used to detect changes of cochlear physiology. We show that a short exposure to perceptually unobtrusive, LF sounds significantly affects OHCs: a 90 s, 80 dB(A) LF sound induced slow, concordant and positively correlated frequency and level oscillations of spontaneous otoacoustic emissions that lasted for about 2 min after LF sound offset. LF sounds, contrary to their unobtrusive perception, strongly stimulate the human cochlea and affect amplification processes in the most sensitive and important frequency range of human hearing.

Low-frequency modulation of the 2f1−f2 distortion product otoacoustic emissions in the human ear

1999 ◽  
Vol 130 (1-2) ◽  
pp. 189-196 ◽  
Author(s):  
Günther Scholz ◽  
Anke Hirschfelder ◽  
Torsten Marquardt ◽  
Johannes Hensel ◽  
Dieter Mrowinski
Keyword(s):  
Frequency Modulation ◽  
Otoacoustic Emissions ◽  
Low Frequency ◽  
Distortion Product Otoacoustic Emissions ◽  
Distortion Product ◽  
Human Ear

Heating and low-frequency modulation of electrons observed during electron beam operations on TSS 1

1997 ◽  
Vol 102 (A8) ◽  
pp. 17335-17357 ◽  
Author(s):  
M. P. Gough ◽  
D. A. Hardy ◽  
W. J. Burke ◽  
M. R. Oberhardt ◽  
L. C. Gentile ◽  
...  
Keyword(s):  
Electron Beam ◽  
Frequency Modulation ◽  
Low Frequency
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