摘要:

A ferrite core coil is used to drive a small magnet fastened to the ossicular chain in kangaroo rat and man. The cochlear potentials recorded in kangaroo rat to such a drive are the same as when acoustic stimuli are used. When magnetic coupling is used to drive the human ossicular chain, the subject hears sounds that are indistinguishable from sounds generated through earphones.

ISSN:0001-4966    

DOI:10.1121/1.1913159

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP

摘要:

Data taken on oneTursiops truncatusare presented for relative difference limens (DLs) in acoustic frequency discrimination. Base frequencies range from 0.9 to 90.0 kHz. The most sensitive frequency discrimination lies in a band between 2.0 and 20.0 kHz. Weber ratios range in value from 0.0028 to 0.0121.

ISSN:0001-4966    

DOI:10.1121/1.1913160

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP

摘要:

Temporal effects in masking experiments, which have been interpreted to show a development of the critical band, are reconsidered. In the view of the present authors, such a development does not occur. The measured effects can rather be attributed to spectral effects and/or the overshoot phenomenon.

ISSN:0001-4966    

DOI:10.1121/1.1913161

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP

摘要:

When dichotic nonsense syllables are presented to temporal lobectomy patients at equal intensities, the ear contralateral to the site of the lesion performs more poorly than the ipsilateral ear; if the ipsilateral ear is stimulated below threshold, the contralateral ear performs near 100%. However, if the intensity ofspeechin the ipsilateral ear is increased above SRT, the contralateral scores drop markedly as intelligibility increases in the ipsilateral ear. This “trade off” does not occur when noise is the competing stimulus. This phenomenon is interpreted as a sign of “speech identification” and is suggested as a potential technique for differentiating speech from nonspeech elements.

ISSN:0001-4966    

DOI:10.1121/1.1913162

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP

摘要:

The direct magnitude‐estimation scaling technique was used to investigate listener perception of vocal loudness and vocal effort of a continuous speech sample. Three experimental conditions were developed that represented (1) normal changes in loudness and effort; (2) intensity held constant and effort varied; and (3) intensity varied and effort held constant. The experiment was conducted twice, once with all stimuli low‐pass filtered below 2000 Hz and once unfiltered. The speech samples were judged by five normal‐hearing listeners on the magnitudes of loudness and of the amount of effort used by the speaker during phonation. Exponents of the loudness and effort functions suggested that vocal loudness and effort were different percepts of the listener. A likely cue that listeners use in perceiving vocal effort was suggested to be the change in the speaker's fundamental frequency concomitant with increases vocal effort.

ISSN:0001-4966    

DOI:10.1121/1.1913163

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP

摘要:

This study examined vowel duration in a language (Malayalam of Southern India) whose vowels contrast phonemically in length. A number of acoustic parameters (formant frequency, fundamental frequency, and intensity) concomitant with duration during stimulus production were examined for their potentially contributing effects. Ten CVCV words, differing only with respect to whether the first vowel was short or long, were uttered in a standard frame and later identified by speakers of Malayalam. The average durations of long vowels were approximately twice that of their short vowel counterparts. Analysis of the other acoustic parameters revealed only small and inconsistent differences between the short and long vowel pairs. It was concluded that the linguistic distinction between short and long vowels may reside in the single parameter of duration.

ISSN:0001-4966    

DOI:10.1121/1.1913164

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP