Document Detail

Conditions and possibilities for the detection of speech-signal elements by means of vibrotaction.
MedLine Citation:
PMID:  2141445     Owner:  NLM     Status:  MEDLINE    
Investigations have been carried out in order to determine (1) the sensitivity of the two types of skin for sinusoidal mechanical vibrations under different stimulation conditions, and (2) the sensitivity of the skin for amplitude modulations. Maximum sensitivity was found around 200 Hz, with a threshold of 0.03 microns RMS for the glabrous skin of the inner side of the hand under a static force of at least 0.5 N. The sensitivity of the hairy skin of the arm was 12 dB less (static force at least 3 N). The sensitivity increased with increasing contractor area. Maximum modulation sensitivity was found for sinusoidal carriers between 200 and 400 Hz and extended from modulation frequencies of 1 Hz up to 200 Hz (depending on carrier frequency) at a frequency-independent modulation depth of about 0.1. It was concluded that it is certainly possible for the skin to detect the slow amplitude fluctuations of speech signals as a support for lipreading. Attention was paid to the best way of extracting the envelopes from the speech signal and their presentation, as an amplitude modulation, to the skin.
P J Lamoré; C J Keemink
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta oto-laryngologica. Supplementum     Volume:  469     ISSN:  0365-5237     ISO Abbreviation:  Acta Otolaryngol Suppl     Publication Date:  1990  
Date Detail:
Created Date:  1990-07-24     Completed Date:  1990-07-24     Revised Date:  2008-02-13    
Medline Journal Info:
Nlm Unique ID:  0370355     Medline TA:  Acta Otolaryngol Suppl     Country:  SWEDEN    
Other Details:
Languages:  eng     Pagination:  47-54     Citation Subset:  IM    
Department of Biomedical Physics and Technology, Erasmus University, Rotterdam, The Netherlands.
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MeSH Terms
Communication Aids for Disabled*
Deafness / rehabilitation*
Equipment Design
Nonverbal Communication
Pacinian Corpuscles / physiology
Physical Stimulation*
Reference Values
Self-Help Devices*
Sensory Thresholds
Skin / innervation
Speech Perception*
Touch / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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