Frequency and amplitude discrimination along the kinestheticcutaneous continuum in the presence of masking stimuli.
Identifieur interne : 000A38 ( Ncbi/Curation ); précédent : 000A37; suivant : 000A39Frequency and amplitude discrimination along the kinestheticcutaneous continuum in the presence of masking stimuli.
Auteurs : Ali Israr [États-Unis] ; Hong Z. Tan ; Charlotte M. ReedSource :
- The Journal of the Acoustical Society of America [ 0001-4966 ] ; 2006.
English descriptors
- KwdEn :
- MESH :
- adverse effects : Noise.
- methods : Acoustic Stimulation.
- physiology : Perceptual Masking, Pitch Discrimination, Touch.
- Adult, Analysis of Variance, Differential Threshold, Female, Humans, Male, Vibration.
Abstract
Frequency and amplitude discrimination thresholds along the kinesthetic to cutaneous continuum were evaluated on the left index fingerpad using a multifinger tactual display. Target stimuli were presented either in isolation (no-masker condition) or in the presence of masking stimuli (one- or two-masker conditions). Six reference target signals in the frequency range 2-300 Hz (two each from low-, medium-, and high-frequency regions) and at an amplitude of either 20 or 35 dB sensation levels (SL) were used. In the no-masker condition, the range of frequency Weber fraction was 0.13-0.38 and 0.14-0.28, and the range of amplitude discrimination threshold was 1.82-2.98 dB and 1.65-2.71 dB, at 20 and 35 dB SL, respectively. In the masking conditions, average frequency Weber fractions rose to 0.60 and 0.46, and average amplitude thresholds rose to 3.63 and 3.72 dB, at 20 and 35 dB SL, respectively. In general, thresholds were largest in the two-masker condition and lowest in the no-masker condition. Although the frequency and amplitude thresholds generally increased in the presence of masking stimuli, there was some indication of channel independence for low- and high-frequency target stimuli. The implications of the results for tactual communication of speech are discussed.
PubMed: 17139739
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pubmed:17139739Le document en format XML
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<author><name sortKey="Tan, Hong Z" sort="Tan, Hong Z" uniqKey="Tan H" first="Hong Z" last="Tan">Hong Z. Tan</name>
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<author><name sortKey="Reed, Charlotte M" sort="Reed, Charlotte M" uniqKey="Reed C" first="Charlotte M" last="Reed">Charlotte M. Reed</name>
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<series><title level="j">The Journal of the Acoustical Society of America</title>
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<term>Female</term>
<term>Humans</term>
<term>Male</term>
<term>Noise (adverse effects)</term>
<term>Perceptual Masking (physiology)</term>
<term>Pitch Discrimination (physiology)</term>
<term>Touch (physiology)</term>
<term>Vibration</term>
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<term>Pitch Discrimination</term>
<term>Touch</term>
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<term>Analysis of Variance</term>
<term>Differential Threshold</term>
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<front><div type="abstract" xml:lang="en">Frequency and amplitude discrimination thresholds along the kinesthetic to cutaneous continuum were evaluated on the left index fingerpad using a multifinger tactual display. Target stimuli were presented either in isolation (no-masker condition) or in the presence of masking stimuli (one- or two-masker conditions). Six reference target signals in the frequency range 2-300 Hz (two each from low-, medium-, and high-frequency regions) and at an amplitude of either 20 or 35 dB sensation levels (SL) were used. In the no-masker condition, the range of frequency Weber fraction was 0.13-0.38 and 0.14-0.28, and the range of amplitude discrimination threshold was 1.82-2.98 dB and 1.65-2.71 dB, at 20 and 35 dB SL, respectively. In the masking conditions, average frequency Weber fractions rose to 0.60 and 0.46, and average amplitude thresholds rose to 3.63 and 3.72 dB, at 20 and 35 dB SL, respectively. In general, thresholds were largest in the two-masker condition and lowest in the no-masker condition. Although the frequency and amplitude thresholds generally increased in the presence of masking stimuli, there was some indication of channel independence for low- and high-frequency target stimuli. The implications of the results for tactual communication of speech are discussed.</div>
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