Hi Tech & Innovation

Talking gloves, tactile windows: New tech helps the disabled

Hadeel Ayoub slips a black glove onto her hand before beginning the swish of sign language that is meaningless to the untrained observer. Then she pushes a button on her wrist, and a small speaker relays the message drawn ...

Engineering

Protective hearing tech in the Army: Not too loud and not too soft

(Tech Xplore)—Soldiers' ears have had a tough challenge. Historically, soldiers have had to choose between hearing protection and force protection. In other words, maintaining situational awareness was not in line with ...

Hearing impairment

A hearing impairment or deafness is a full or partial decrease in the ability to detect or understand sounds. Caused by a wide range of biological and environmental factors, loss of hearing can happen to any organism that perceives sound. "Hearing impaired" is often used to refer to those who are deaf, although the term is viewed negatively by members of Deaf culture, who prefer the terms "Deaf" and "Hard of Hearing".

Sound waves vary in amplitude and in frequency. Amplitude is the sound wave's peak pressure variation. Frequency is the number of cycles per second of a sinusoidal component of a sound wave. Loss of the ability to detect some frequencies, or to detect low-amplitude sounds that an organism naturally detects, is a hearing impairment.

This text uses material from Wikipedia, licensed under CC BY-SA