چکیده:
Objective: Conducting field tests of a vibrotactile aid for deaf/deafblind persons for detection, identification and directional perception of environmental sounds. Subjects & method: Five deaf (3F/2M, 22–36 years) individuals tested the aid separately in a home environment (kitchen) and in a traffic environment. Their eyes were blindfolded and they wore a headband and holding a vibrator for sound identification. In the headband, three microphones were mounted and two vibrators for signalling direction of the sound source. The sounds originated from events typical for the home environment and traffic. The subjects were inexperienced (events unknown) and experienced (events known). They identified the events in a home and traffic environment, but perceived sound source direction only in traffic. Results: The detection scores were higher than 98% both in the home and in the traffic environment. In the home environment, identification scores varied between 25%-58% when the subjects were inexperienced and between 33%-83% when they were experienced. In traffic, identification scores varied between 20%-40% when the subjects were inexperienced and between 22%-56% when they were experienced. The directional perception scores varied between 30%-60% when inexperienced and between 61%-83% when experienced. Conclusion: The vibratory aid consistently improved all participants’ detection, identification and directional perception ability.
خلاصه ماشینی:
Iranian Rehabilitation Journal , Vol. 6, No. 7 & 8,2008 Case Report / series Vibrotactile detection,identification and directional perception of signal-processed sounds from environmental events: A pilot field evaluation in five cases Parivash Ranjbar, PhD student; Agneta Anderzén Carlsson, PhD; Örebro University, Sweden Lennart Neovius, Techn.
Lic. Saven Hitech AB, Sweden Camilla Johansson, MS; Erik Borg, PhD Örebro University Hospital, Sweden Objective: Conducting field tests of a vibrotactile aid for deaf/deafblind persons for detection, identifica- tion and directional perception of environmental sounds.
The specific purpose of this present study was to evaluate a vibrotactile monitoring aid for the deaf and deafblind for detection, identification and di- rectional perception of environmental sounds in a home and in a traffic environment.
Method: The vibrotactile monitoring aid was tested with equipment identical to that used in the acoustical laboratory (23) in the home and in a traffic en- vironment for detection, identification and direc- tional perception of environmental sounds under two conditions: The subjects were inexperienced (the events were unknown to them) The subjects were experienced (they had previ- ously experienced the events), and the aid was in either the on or off position.
In the experienced part of the test, when the aid was in the off position, the identification score for S1, S2 and S4 was 0% (the subjects did not detect any presented event), and for S3 and S5 it was 5.
Figure 4: Identification scores for events (sounds) and their direction in traffic for 5 profoundly hear- ing impaired or deaf subjects using the vibratory aid.