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  • Title: Comparison between hearing threshold measurements made with and without the aid of an ear speculum.
    Author: Ivarsson A, Erlandsson B, Håkanson H, Nilsson P, Bennrup S, Sheppard H.
    Journal: Audiology; 1983; 22(5):421-9. PubMed ID: 6651619.
    Abstract:
    The hearing threshold levels of a small group of shipyard workers having differing degrees of hearing impairment were measured five times using the following audiometric techniques: fixed-tone Békésy audiometry with MX 41/AR cushions, fixed-tone Békésy audiometry with an ear speculum, and sweep-frequency Békésy audiometry with an ear speculum. From these data the mean standard deviations of the hearing threshold levels for the frequencies 0.5, 1, 2, 3, 4, 5, 6, 7 and 8 kHz were calculated, thus giving a measure of the accuracy of each method. The hearing threshold levels obtained by the three methods are compared, and the merits of data handling, expressing hearing threshold levels in pascals rather than decibels, are also discussed.
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