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Results Obtained by Various Investigators
Personal Investigations and Results Obtained with Original Apparatus
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absolute DLF adequacy of hearing age group arithmetic mean auditory binaural bone-conduction cent check-up measurements comparison conductive aetiology conductive hearing defects continuous method curves cycles per second db above threshold Determinations of DLF difference limen differential sensitivity DLF audiograms DLF in pathological DLF obtained DLI test electro-acoustic examination fatigue frequency deviation frequency modulation frequency-modulated tones hearing aid Hearing Rehabilitation Centre intensity level intensity of 20 intolerance to pure less than 1.80 loud speech Metz test modified apparatus monaural balance test neper NLP acust normal ears normal subjects Odense County original apparatus otosclerosis pathological ears perceptive hearing defects presbyacusis presence of recruitment present study pure tones pure-tone audiometry recruitment tests relative DLF results obtained Schubert sensitivity to frequency series of normal severe hearing losses Shower and Biddulph slightly increased speech audiometry standard frequencies studied stapedius studied the DLF TA-A tones and loud tympanic membrane undersøgelser various warble rate