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The term "echolocation" was coined by zoologist Donald Griffin in 1944. But the phenomena was known about earlier, for example, Denis Diderot reported in 1749 that blind people could locate silent objects. [1] Human echolocation has been known and formally studied since at least the 1950s. [2]
The Trinetra project aims to develop cost-effective, independence-enhancing technologies to benefit blind people. One such system addresses accessibility concerns of blind people using public transportation systems. Using GPS receivers and staggered Infrared sensors, information is relayed to a centralized fleet management server via a cellular ...
Assistive technology (AT) is a term for assistive, adaptive, and rehabilitative devices for people with disabilities and the elderly. Disabled people often have difficulty performing activities of daily living (ADLs) independently, or even with assistance. ADLs are self-care activities that include toileting, mobility (ambulation), eating ...
In 1938, President Roosevelt signed the Wagner-O'Day Act which directed the government to purchase products manufactured by blind Americans. [3] Robert Irwin, who was the executive director of the American Foundation for the Blind, and Peter Salmon, the assistant director for the Industrial Home for the Blind, promoted the bill in Washington, D.C. [3] This act gave non-profit organizations for ...
A curvilinear array ultrasonic transducer for use in medical ultrasonography Inside construction of a Philips C5-2 128 element curved array ultrasound sensor. Ultrasonic transducers and ultrasonic sensors are devices that generate or sense ultrasound energy. They can be divided into three broad categories: transmitters, receivers and transceivers.
According to Light for the World, it is estimated there are about 1.2 million people with disabilities in South Sudan. The country signed the UN’s disability rights convention last year in a ...
World Access for the Blind (WAFTB) is an international non-profit, non-governmental and educational organisation based in California, United States.The organisation was started to strengthen the physical, mental and personal development of people with all forms of blindness, and to increase public awareness about the strengths and capabilities of blind people.
CHICAGO – Perched between his bed and a dresser, Michael Thomas sits on the floor of his Chicago home and tries to pass the time, stringing beads along a lanyard and waiting for the phone to ring.