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Overestimation of hearing loss is a significant problem in the assessment of workers exposed to industrial noise. Audiometric and epidemiologic aspects of this problem are examined in 2,528 compensation claimants. Electric Response Audiometry (ERA) using the cortical Slow Vertex Response (SVR) is accurate and very useful for quantification of true hearing(More)
The aims of this research were to document changes in hearing and speech intelligibility in noise that occur with ageing, noise sensitivity, and progressive bilateral sensorineural hearing loss. Five groups defined by age, clinical complaint and degree of hearing loss were tested. Each of 73 subjects participated in nine different procedures, including(More)
In a study of 3466 claimants for noise-induced occupational hearing loss tinnitus was reported by half of the patients. Its characteristics in this select group were different from tinnitus seen in other groups. Specifically, tinnitus prevalence seemed to be independent of age, state of hearing and duration of noise exposure if greater than 10 years. The(More)
The clinical utility of auditory evoked potentials for validation of the pure tone audiogram in adult compensation claimants and medicolegal patients is examined. Large sample comparisons of evoked potential and conventional pure tone thresholds showed that the slow vertex response can estimate true hearing levels within 10 dB in almost all patients. Given(More)
There have been repeated claims in the literature that hearing thresholds can be estimated by means of acoustic reflex threshold (ART) measurements. We have evaluated this thesis in depth by examining the statistical relationships between conventional puretone thresholds and ARTs for tonal and broadband stimuli in a large sample (1207) of adult patients(More)
This research investigated the effect of car protectors on the intelligibility of speech in noise. Listeners with normal hearing, high-frequency, and flat loss were tested. Half the subjects in each group were fluent in English and half-poorly conversant. Taped lists of 25 words were presented free field under conditions defined by the speech-to-noise(More)
The use of brainstem electric response audiometry (BERA) for early detection of hearing loss is predicated upon large-sample normative data. Auditory brainstem response (ABR) thresholds for click and notch-masked tonepip stimuli were examined in 230 normal infants with no risk factors for hearing loss, tested under audiometrically ideal conditions at(More)
The detection of one-third octave signals superimposed on backgrounds of steady-state and intermittent industrial noise of 84 dBA was investigated for observers with normal hearing or moderate to severe noise-induced hearing loss (NIHL). Variables included age, noise exposure history, configuration of the audiogram and the wearing of insert hearing(More)
Click ABR wave V thresholds in the first year were compared with follow-up behavioural pure-tone audiometry under earphones at age 3 to 6 years in 713 infants (yielding 1,367 ears) at risk for hearing loss. The observed accuracy of the ABR depends strongly on the precise definitions of the target disorder and the test abnormality criteria. For sensorineural(More)
We examined 596 patients referred with possible noise-induced hearing loss, by conventional and cortical evoked response audiometry. Discrepancies between the two tests identified 121 (20.3%) as exaggerating their hearing loss. We then studied the validity of simple conventional tests, which would be available in primary diagnostic facilities, in screening(More)