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2005 Fiscal Year Final Research Report Summary

TEOAE EVOKED BY COMPLEX TONE BURST SIMULATING VOWEL AND MONOSYLLABLE JAPANESE WORD COMPONENT AND RERATIONSHIP BETWEEN AGING OF COCHLEA.

Research Project

Project/Area Number 14571634
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Otorhinolaryngology
Research InstitutionJUNTENDO UNIVERSITY

Principal Investigator

YOSHIKAWA Hiroshi  JUNTENDO UNIVERSITY, SCHOOL OF MEDICINE, PROFESSOR, 医学部, 教授 (50133327)

Co-Investigator(Kenkyū-buntansha) NISHIJIMA Takashi  JUNTENDO UNIVERSITY, SCHOOL OF MEDICINE, 医学部, 助手 (80266022)
NAKAMURA Shotaro  JUNTENDO UNIVERSITY, SCHOOL OF MEDICINE, 医学部, 助手 (70245752)
FUJIMOTO Yukiko  JUNTENDO UNIVERSITY, SCHOOL OF MEDICINE, 医学部, 助手 (10327843)
Project Period (FY) 2002 – 2005
KeywordsEVOKED OTOACOUSTIC EMISSION / MONOSYLLABLES / COCHLEAR FUNCTION / SENIAL HEARING LOSS / MONOSYLLABLE PERCEPTION
Research Abstract

Otoacoustic emissions are useful to estimate the status of individual cochlear function. Especially in transiently evoked otoacoustic emission (TEOAE), the averaged waveform and the power spectrum provide the different kinds of information concerning the cochlear response to the stimulus in frequency and time domain, and also provide the inter-individual difference in response. The possibility of the TEOAE measurement to assess the responsibility of the cochlear to speech sound was investigated in the present study, since some objective measurement for the function of cochlear, the organ for communication, to speech sound was thought to be necessary.
We investigated TEOAEs evoked by complex stimuli as a model of vowel and monosyllable Japanese word component. Five kinds of tone burst stimuli were generated using tone burst generation function of ILO88 as the model of vowel. The published mean frequencies of the vowel formants evaluated in Japanese young women were introduced into tone b … More urst generation. Furthermore, also the complex tone bursts were created in the same way using click and the tone burst models of vowel as the model of the monosyllable Japanese word component. TEOAEs were recorded with ILO88 Otodynamic Analyzer and the wave form and the power spectrum were investigated in terms of inter-stimulus and inter-individual difference respectively.
In the results, the waveforms of TEOAE evoked by the vowel models indicated inter-stimulus and inter-individual differences. The power spectrum of TEOAE corresponded to the components of each stimulus. The test-retest stability of TEOAE was confirmed within one-year period. The waveform of TEOAE evoked by the model of the Japanese monosyllable word components also indicated inter-stimulus and inter-individual difference and the early and the late component of the waveform were mainly affected by the click and the vowel component respectively.
From these results, we concluded that the long-term stability, the inter-stimulus and the inter-individual difference of the TEOAE waveform were confirmed and the characteristics of complex stimuli were reflected in the wave form and the power spectrum of TEOAE. The function of monosyllable perception, however, could not be estimated in the present method objectively in hearing normal subjects. Less

  • Research Products

    (6 results)

All 2003 2002

All Journal Article (6 results)

  • [Journal Article] 成人と新生児・乳児における各種耳音響反射の相互関係について2003

    • Author(s)
      西嶋 隆, 芳川 洋, 藤本由紀子, 奈良林修, 市川銀一郎
    • Journal Title

      Audiology Japan 46・1

      Pages: 66-73

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 剣道経験者における標準純音聴力検査結果と耳音響放射との関係2003

    • Author(s)
      藤本由紀子, 芳川 洋, 西嶋 隆, 奈良林修, 市川銀一郎
    • Journal Title

      Audiology Japan 46・1

      Pages: 57-65

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Relationship among spontaneous, evoked and distortion product otoacoustic emissions in adults and infants.2003

    • Author(s)
      Takashi Nishijima, Hiroshi Yoshikawa, Osamu Narabayashi, Yukiko Fujimoto, Ginichiro Ichikawa
    • Journal Title

      Audiology Japan 46-1

      Pages: 66-73

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Relationship between audiogram and otoacoustic emissions in the Kendo players.2003

    • Author(s)
      Yukiko Fujimoto, Hiroshi Yoshikawa, Takashi Nishijima, Osamu Narabayashi, Ginichiro Ichikawa
    • Journal Title

      Audiology Japan 46-1

      Pages: 57-65

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 誘発耳音響放射と歪成分耳音響反射の周波数対応性の検討2002

    • Author(s)
      芳川 洋, 西嶋 隆, 藤本由紀子, 奈良林修, 市川銀一郎
    • Journal Title

      Audiology Japan 45・5

      Pages: 429-430

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Relationship between click evoked and distortion product otoacoustic emissions in frequency domain2002

    • Author(s)
      Hiroshi Yoshikawa, Takashi Nishijima, Yukiko Fujimoto, Osamu Narabayashi, Ginichiro Ichikawa
    • Journal Title

      Audiology Japan 45-5

      Pages: 429-430

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2007-12-13  

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