聴性定常反応聴力検査 Auditory Steady-State Response Audiometry

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著者

    • 青柳 優 AOYAGI Masaru
    • 山形大学情報構造統御学講座耳鼻咽喉・頭頸部外科学分野 Yamagata University School of Medicine

抄録

This study describes the history, stimulus tones, detection techniques, source generators and clinical applications of auditory steady-state responses (ASSR). The most important benefit of ASSR in objective audiometry is that it can provide an accurate assessment of hearing at different audiometric frequencies in a frequency specific manner, if sinusoidally amplitude-modulated tones are used as tonal stimuli. Power spectrum analysis and phase coherence using fast Fourier transform are useful for the automatic detection of threshold because of the sinusoidal response waveform configuration. Because the detectability of ASSR changes under different arousal states, 40-Hz ASSR is suitable for waking adults and 80-Hz ASSR for sleeping children in the assessment of hearing. Regarding the sources of those responses, 40-Hz ASSR is considered the steady-state version of the middle latency response and 80-Hz ASSR is considered the steady-state version of auditory brainstem response (ABR). Bone conduction stimuli are also useful in the assessment of conductive hearing loss, though the responses are not reliable at the intensity level of 60dB or higher. The difficulty in predicting a hearing level of 500Hz or less using the 80-Hz ASSR threshold can be explained by auditory filter. Its advantage is that the thresholds at 4 different frequencies in both ears can be predicted more rapidly than ABR using the multiple simultaneous stimulation technique. In addition, the ASSR to clicks may provide a rapid screening technique. Finally, it may be helpful in assessing suprathreshold hearing to use ASSRs to sounds that sweep their intensity (sweep technique) or actual speech sounds. In this respect, ASSRs may contribute to the objective fitting of hearing aids in young children.

収録刊行物

  • 耳鼻咽喉科臨床  

    耳鼻咽喉科臨床 101(3), 159-174, 2008-03-01 

    The Society of Practical Otolaryngology

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各種コード

  • NII論文ID(NAID)
    10021294035
  • NII書誌ID(NCID)
    AN00107089
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00326313
  • NDL 記事登録ID
    9404279
  • NDL 雑誌分類
    ZS43(科学技術--医学--耳鼻咽喉科学)
  • NDL 請求記号
    Z19-421
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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