Summary
In a group of 30 adults with impaired hearing, objective thresholds defined with 40 Hz middle latency responses (MLR) were compared with subjective audiometric measures. Frequencies of 0.25, 0.5, and 1 kHz were studied. In order to guarantee a good frequency specificity, subjects presenting large high-frequency hearing loss were particularly chosen. The 40-Hz MLR thresholds were generally worse than the audiometric measures. The average difference was around 12 dB, but in about one-third of the cases it was between 20 and 30 dB. Although not perfect, 40-Hz MLR estimates on low frequencies can be very helpful and deserve further consideration, especially in children.
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Dauman, R., Szyfter, W., de Sauvage, R.C. et al. Low frequency thresholds assessed with 40 Hz MLR in adults with impaired hearing. Arch Otorhinolaryngol 240, 85–89 (1984). https://doi.org/10.1007/BF00464350
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DOI: https://doi.org/10.1007/BF00464350