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At least 721 records · Page 40Linked to original sources
PubMed1981

[Speech audiometry in advanced age - differentiating between the elements of primary and secondary presbyacusis (author's transl)].

Tone threshold, speech intelligibility by the Freiburg test with loss of hearing for speech, discrimination loss and total word intelligibility, dichotic discrimination and binaural summation ability were all measured in 167 test subjects aged between 65 and 91 years. The statistical processing of the numerous parameters shows that all parameters manifest a worsening of hearing with age, the individual values revealing a considerable scatter. Tone loss proved to be largely cochlear in nature. All the speech audiometric parameters correlated highly significantly (binaural summation significantly) with age, in the sense that increasing was accompanied by a worsening of the hearing ability. The complex correlations among all the hearing parameters lead us to believe that ageing affects the organ of hearing as a whole, and not merely specific parts of the auditory pathway. A possibility for differentiating between the elements of primary and secondary presbyacusis, and for measurement of the biological age of the sense organ, ear, is discussed.

Age Factors↗
PubMed1980

High frequency Bekesy audiometry. I: equipment and calibration.

A simple, straightforward and inexpensive conversion of the high-frequency (HF) range (up to 20 kc/s) of the Grason-Stadler E-800 Bekesy audiometer is described, incorporating as transducer a 1/2-inch condenser microphone loosely coupled to the ear canal by an adjustable headband, which provides also for a standard audiometric earphone-cushion unit on the non-test ear. A free field calibration is recommended. The system has a dynamic range of 135 db. Step-by-step instructions are provided for the conversion and for calibrations. Repeated calibrations of a prototype unit showed acceptable stability and validity. The HF E-800 audiometer could provide a valuable and cost-effective source of HF diagnostic information for the audiologist.

Audiometry↗
PubMed1981

High frequency Bekesy audiometry: II. Threshold test procedure, reliability and validity.

Normal-hearing Ss (N: 20) produced 2 sets of Bekesy threshold tracings, from 2-8 kc/s, on a conventional Grason-Stadler E-800 audiometer, and from 2-20 kc/s on a unit (HF E-800) modified for high frequencies. Half the Ss then produced at least 2 sets of tracings each in the fixed-frequency mode on the HF E-800. The pulsed-tone fixed-frequency procedure is recommended for HF HTLs. Maximum mean test-retest HTL differences of 1-4 db were obtained. Reliability r's obtained from the HF E-800 were equivalent to or surpassed those from the E-800; a very high proportion of such coefficients was statistically significant. Reduced validity coefficients, calculated at the frequencies common to the units, were attributed at least in part to differences in methods of coupling the transducers to the ear. It was concluded that the HF E-800 unit in the fixed-frequency mode could be used with some confidence to assess HF HTLs.

Adult↗