Biomedical subjects

E M Weiler

Publications and source records attributed to E M Weiler.

7 recordsLinked to original sources

PubMed1992

Four triggering factors in loudness adaptation.

A factor analysis was used to determine whether induced loudness adaptation (Botte, Canevet, & Scharf, 1982; Scharf, 1983) and adaptation measured by Hood's (1950) classic Simultaneous Dichotic Loudness Balance technique (SDLB) would cluster on the same factors. The two phenomena did not cluster on the same factors; thus, induced adaptation cannot replace SDLB adaptation. Four independent factors that trigger auditory adaptation were identified in the factor analysis.

Adolescent↗

PubMed1979

Investigation of the relationship between adaptation measured binaurally and monaurally.

Recently it has been demonstrated that auditory adaptation can be measured with a monaural technique (Weiler and Friedman, 1973; Weiler and Gross, 1976; Feaster and Weiler, 1975). Because the magnitude of adaptation measured monaurally was nearly identical to that measured binaurally in other experiments, it was assumed that they measured the same phenomenon or phenomena. In the present study the same group of subjects were tested for magnitude of adaptation both monaurally and binaurally. The means were 11.75 dB and 12.17 dB, respectively (N=13). Depsite nearly identical means for the present conditions there was no significant correlation (r=+.27) between the magnitude of adaptation measured under the two conditions. Except for the possibility that individual differences in the ability to do monaural versus binaural tasks may have obscured individual similarities in adaptation, the only other explanation the authors can suggest is that the two techniques measure different aspects of loudness adaptation.

Adult↗

PubMed1979

Monaural balances and loudness coding during auditory adaptation.

A monaural simultaneous balance technique was used to compare amounts of adaptation for two conditions: (1) with the test intensity equal to the adapting intensity, and (2) with the test intensity +10 dB above the adapting intensity. Previous findings (Weiler and Hood, 1977) showed a decline in measured adaptation for the second condition using simultaneous binaural balances. That this was not the case for the monaural balances investigated in this study may indicate different adaptation-induced auditory changes are being measured monaurally vs. binaurally.

Adult↗

PubMed1978

Ear dominance effects in loudness following auditory adaptation.

In recent years there has been much attention to the study of ear differences in the response to auditory stimuli. However, the possibly of ear differences in auditory adaptation effects has apparently not been investigated. The present authors used a monaural heterophonic balance to investigate the adaptation of a 500 Hz adapting tone. Ten subjects were tested in the left ear, ten in the right. Left ear adaptation was 4.20 dB, while right ear adaptation was 12.88 dB (p is less than or equal to .001). Previous differences in binaural adaptation studies could conceivably have been partially influenced by the ear adapted. It is suggested that the possibility of ear differences in loudness adaptation be taken into account in future studies.

Adolescent↗

PubMed1978

A shorter version of the Weiler-Hood model for loudness coding during adaptation.

A graphic/algebraic model proposed by Weiler and Hood (Audiol., 1977, 16, 499-506) for loudness coding during auditory adaptation, assuming a fixed loss of loudness units for a given adaptation to any test intensity, was shown to describe several sets of adaptation data quite well. The present paper offers a more convenient algebraic formula using only the obtained post-adaptation balance level at the baseline intensity rather than a smoothed adaptation function. This shortening is at the expense of a somewhat increased influence of random fluctuations.

Adaptation, Psychological↗

PubMed1977

Sex of listener and hormonal correlates of auditory thresholds.

The present study investigates changes in auditory threshold during 4-6 week intervals for men, women on birth control pills, and normal cycling women not on birth control pills. Thresholds were determined at 250, 500, 1,000, 2,000, 4,000, 6,000, 8,000 Hz. Normal cycling females had significantly lower thresholds during first half of the menstrual cycle than during the second half. Females on birth control pills showed significantly and consistently lower thresholds than other listeners at several frequencies. Explanations for the phenomena are proposed.

Adolescent↗

PubMedDate not supplied

An improved model for loudness coding during auditory adaptation.

A comparison of loudness adaptation measured at four baseline intensities and at test values 10 and 20 dB above the baseline intensities revealed an orderly decline. The magnitude of the decline in loudness adaptation with the increasing difference between the test values and the baseline was shown to agree with earlier theories. A method for closely estimating the change in loudness adaptation is presented in convenient graphic form and in algebraic equations.

Acoustic Stimulation↗