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[TMJ clicking sounds and changes in masking level].

T Ozaki, K Kubota, E Kanazawa

    Nichidai Koku Kagaku = Nihon University Journal of Oral Science
    |June 1, 1989
    PubMed
    Summary

    Temporomandibular joint (TMJ) clicking sounds, often near 1 KHz, can impact speech range hearing. This study found significant differences in auditory masking levels between normal and abnormal subjects, suggesting TMJ sounds affect hearing.

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    Area of Science:

    • Audiology
    • Biomedical Engineering
    • Speech Science

    Context:

    • Temporomandibular joint (TMJ) clicking sounds exhibit a power spectrum peak near 1 KHz.
    • This frequency range overlaps with crucial speech frequencies.
    • Understanding the auditory impact of TMJ sounds is important for diagnosing hearing issues.

    Purpose:

    • To investigate the influence of TMJ clicking sounds on hearing ability within the speech frequency range.
    • To compare auditory masking levels in normal individuals versus those with TMJ dysfunction.
    • To assess the effect of mechanical stimulation from TMJ sounds on auditory perception.

    Summary:

    • A masking experiment using narrow-band noise was conducted on 10 normal individuals and 19 patients with TMJ dysfunction.

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  • Results showed significant differences in masking levels at 1,000 Hz between the two groups (p < 0.05).
  • Normal subjects required higher masking levels (27.0 dB) compared to TMJ patients (20.6 dB) at 1,000 Hz.

    • Impact:

    • The study suggests that the acoustic components of TMJ clicking sounds can specifically influence auditory levels in patients.
    • Findings indicate a potential link between TMJ mechanical stimulation and altered speech frequency hearing.
    • This research highlights the need to consider TMJ disorders in audiological assessments, particularly for speech-related hearing difficulties.