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High-frequency thresholds using a quasi-free-field technique

D Osterhammel

    Scandinavian Audiology
    |January 1, 1978
    PubMed
    Summary
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    Children aged 10-12 years demonstrated superior high-frequency hearing, hearing up to 20 kHz. This finding suggests children may establish a new zero-decibel hearing threshold for high-frequency audiometry.

    Area of Science:

    • Audiology and Hearing Science
    • Otolaryngology
    • Human Auditory Perception

    Background:

    • High-frequency hearing assessment is crucial for detecting early auditory changes.
    • Establishing normative hearing threshold data, especially in younger populations, is essential for accurate diagnosis.
    • Free-field audiometry offers a realistic sound environment for hearing threshold determination.

    Purpose of the Study:

    • To evaluate hearing thresholds in children and adults using a free-field transducer system for high-frequency audiometry.
    • To compare high-frequency hearing capabilities between young children (10-12 years) and young adults (18-24 years).
    • To investigate the potential of the pediatric group as a reference for zero-decibel hearing threshold levels in high-frequency studies.

    Main Methods:

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    • Two groups of otologically normal, non-noise-exposed subjects (46 children, 40 adults) were tested.
    • High-frequency audiometry was conducted using a free-field transducer system at frequencies from 4 to 20 kHz.
    • Hearing thresholds were measured and compared between age groups, sexes, and ears.

    Main Results:

    • All children could hear 20 kHz, with no significant differences between sexes or ears.
    • Adults generally had similar thresholds, though 4 males could not hear 20 kHz.
    • Children exhibited statistically significant lower hearing thresholds at 18 and 20 kHz compared to adults.

    Conclusions:

    • Young children (10-12 years) possess excellent high-frequency hearing capabilities up to 20 kHz.
    • This pediatric cohort may serve as a valuable reference group for establishing zero-decibel hearing threshold levels in future high-frequency audiometric research.
    • The study highlights the potential for age-related differences in high-frequency hearing and discusses the importance of sound pressure level calibration.