Otoacoustic Emissions and Cochlear Travelling Waves

  • Eberhard Zwicker
Part of the NATO ASI Series book series (NSSA)


An interesting characteristic of human hearing is the frequency distance of extreme values of all three kinds of emissions, spontaneous (SOAE), simultaneous evoked (SEOAE), and delayed evoked (DEOAE) otoacoustic emissions. This preferred frequency distance was described as being frequency dependent. Transformed into the critical band rate, however, it shows a quite constant value. The first data collection (Zwicker and Schloth, 1984) pointed towards a characteristic value of about a half of a critical band width. Larger data collection (Dallmayr, 1985, 1987) for SOAE and SEOAE uncovered this characteristic value as being close to 0.4 Bark. This value seems to be very stable and quite independent of subjects. The reason for this value must be hidden somehow in the cochlear mechanics. It is the goal of this paper to search for such a relation.


Outer Hair Cell Basilar Membrane Otoacoustic Emission Oval Window Human Hearing 
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Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • Eberhard Zwicker
    • 1
  1. 1.Institute of ElectroacousticsTechnical University MünchenMünchen 2F.R. Germany

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