7.19 insert earphone. An earphone coupled by a tube and/or ear mold with the output tip inside the ear...
7.18 hearing assistance devices/systems (HADS). A group of instruments intended to facilitate hearing by providing amplification of an acoustic signal and/or improving the signal-to-noise ratio by means of a non-acoustic signal transmission method....
7.17 hearing aid. Any wearable sound amplification device designed for, offered for the purpose of, or represented as aiding persons with hearing loss. Annotation In general, hearing aids have internal...
7.16 circumaural earphone. Earphone which encloses the pinna and rests on the surrounding surface of the head. Annotation Contact with the head is normally maintained by compliant...
7.15 earphone. Electroacoustic transducer intended to be closely coupled to the...
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