Audio aid for the blind

Details Audio aid for the blind Audio aid for the blind

1986-09-15

1987-07-14

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367910, G01S 1588

Patent

active

046807403

ABSTRACT:
A low cost, effective electronic audio aid for the blind who have good hearing. The aid employs a hand held housing about the size of a flashlight which contains a battery power supply and electronic-audio circuit together with a somewhat directional audio speaker for emitting a low power, directional beam of acoustic energy having specially-shaped audio waveforms which when impinging on an object in the vicinity of the user return an altered, reflected characteristic sound signal which can be audibly discerned by the user to detect the presence of the object and its approximate location.

REFERENCES:
patent: 3987403 (1976-10-01), Smith

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