ACOUSTIC ADDITION DEVICE FOR VISUALLY IMPAIRED PERSON

PROBLEM TO BE SOLVED: To provide an acoustic addition device for a visually impaired person, which secures safety of a visually impaired person when guiding sound of an appropriate sound volume is not output at predetermined timing or when there is a malfunction in a device due to long-term deterior...

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Bibliographic Details
Main Author IKEDA NAOYUKI
Format Patent
LanguageEnglish
Japanese
Published 26.04.2018
Subjects
PHYSICS
SIGNALLING
TRAFFIC CONTROL SYSTEMS
Online AccessGet full text

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