Vibrotactile and electrotactile perception of time-varying pulse trains.
J Acoust Soc Am
; 95(3): 1548-58, 1994 Mar.
Article
em En
| MEDLINE
| ID: mdl-8176058
ABSTRACT
To establish the best strategy for transmitting speech-derived information via a single tactile channel, measurements were made on the perception of frequency- and/or amplitude-modulated pulse-train stimuli, with a comparison of the electrotactile and vibrotactile modalities. In one experiment, vibrotactile perception of 2-oct step changes in stimulus frequency was found to be significantly better than electrotactile on a time-scale appropriate for the transmission of speech features (e.g., with practiced subjects, information transfer of 69% with 200-ms vibrotactile stimuli, 32% with 200-ms electrotactile stimuli). Perception of step changes in stimulus amplitude was similar in the two modalities when changes in amplitude were tailored to match the different dynamic ranges available. In a second experiment, vibrotactile-perception of voice fundamental frequency with various codings was investigated. Both experiments showed information transfer for vibrotactile stimuli to be greater when frequency and amplitude modulation were used together rather than with one or the other in isolation (sentence-stress identification scores 66% for FM stimuli, 69% for AM stimuli, 80% for FM/AM stimuli). It is concluded that frequency- and amplitude-modulated vibratory stimulation is a good choice in a practical device for the profoundly hearing impaired.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Auxiliares Sensoriais
/
Percepção da Fala
/
Percepção do Tempo
/
Tato
/
Vibração
Tipo de estudo:
Prognostic_studies
Limite:
Adolescent
/
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
J Acoust Soc Am
Ano de publicação:
1994
Tipo de documento:
Article
País de afiliação:
Reino Unido