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Design: One hundred and twelve participants (71 female) who underwent audiometric screening for a sensorineural hearing loss, classified as either normal or mild, were recruited. Their age range was 32 to 74 years. They were administered the TEN test at four frequencies, 0.75, 1, 3 and 4 kHz, and at two sensation levels, 12 and 24 dB above their pure-tone absolute threshold at each frequency. The test frequencies were chosen to lie either distinctly away from, or within, the 2 - 6 kHz region where noise-induced hearing loss is first clinically observed as a notch in the audiogram. Cumulative noise exposure was assessed by the Noise Exposure Structured Interview (NESI). Elements of the NESI also permitted participant stratification by music experience.
Results: Across all frequencies and testing levels, a strong correlation was observed between elevation of TEN threshold and absolute threshold. These correlations were little-changed even after noise exposure and music experience were factored out. The correlations were observed even with in the range of ‘normal’ hearing (absolute thresholds ≤ 15 dB HL). Stone et al Supra-threshold losses and TEN test
Conclusions: Using a clinical test, sensorineural hearing deficits were observable even within the range of clinically ‘normal’ hearing. Results from the TEN test residing between ‘pass’ and ‘fail’ reflect decay of processes not related to IHCs. IHC-related processes, for which the TEN test was originally designed, such as may be caused by high-level noise exposure, only dominate when a ‘fail’ criterion is reached.
FingerprintDive into the research topics of 'Threshold Equalizing Noise test reveals supra-threshold loss of hearing function, even in the ‘normal’ audiogram range'. Together they form a unique fingerprint.
Munro, K., Millman, R., Lamb, W., Dawes, P., Plack, C., Stone, M., Kluk-De Kort, K., Moore, D., Morton, C., Prendergast, G., Couth, S., Schlittenlacher, J., Chilton, H., Visram, A., Dillon, H., Guest, H., Heinrich, A., Jackson, I., Littlejohn, J., Jones, L., Lough, M., Morgan, R., Perugia, E., Roughley, A., Short, A., Whiston, H., Wright, C., Saunders, G. & Kelly, C.
Investigation of Low-Sound-Level Auditory Processing Deficits After Chronic Exposure to Very High Noise Levels.
1/10/15 → 30/09/18