体温が絶対音感保持者の音高決定に与える影響に関する研究  [in Japanese] The effect of body temperature on the determination of pitch in absolute pitch possessor  [in Japanese]

Abstract

聴覚器官は機械的構造をもつことから,熱膨張や組織の弾性率の温度特性により絶対音感(AP)に体温の影響があると考えられる.そこで本研究では,体温がAPにどのように影響するのかを調べた.純音発生器を用いてAP保持者自身の音高でA4(440Hz)に調節するように指示し,同時に耳式赤外線体温計によって鼓膜温度を測定した.その結果,被験者が440Hzと認識した周波数と体温には,限定的な期間において高い相関(R^2=0.7以上)が見られ,温度係数が約-3Hz/Kであることがわかった.このことから,極限の周波数弁別能力を達成するためには,蝸牛内の体温は約0.1Kの精度で調節される必要があると考えられる.

Body Temperature change may influence on the performance of absolute pitch (AP) possessor because the auditory organ has a mechanical structure. An AP possessor was asked to measure body temperature and tune a sound generator to A4 (440Hz). The body temperatures and corresponding frequencies were recorded. Although correlation coefficients between body temperature and determined frequency was insignificant, there was some limited period where R^2>0.7 with temperature coefficient about -3Hz/K. It was shown that cochlear temperature must be regulated to within 0.1K to achieve 0.1% of frequency discrimination.

Journal

IEICE technical report. ME and bio cybernetics   [List of Volumes]

IEICE technical report. ME and bio cybernetics 106(81), 21-24, 2006-05-20  [Table of Contents]

The Institute of Electronics, Information and Communication Engineers

References:  7

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Codes

  • NII Article ID (NAID) :
    110004744965
  • NII NACSIS-CAT ID (NCID) :
    AN1001320X
  • Text Lang :
    JPN
  • Article Type :
    ART
  • ISSN :
    09135685
  • NDL Article ID :
    7939308
  • NDL Source Classification :
    ZN33(科学技術--電気工学・電気機械工業--電子工学・電気通信)
  • NDL Call No. :
    Z16-940
  • Databases :
    CJP  NDL  NII-ELS 

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