Assistive listening device for the hearing impaired; Digital hearing aids; Ear plugs for hearing protection; Electric hearing aids; Electrically-operated hearing aids; Electrically operated hearing aids; Hearing aids; Medical hearing instruments and parts of such devices; Medical testing devices for measuring hearing loss in patients, namely, audiometers; Parts of acoustic apparatus for the hearing-impaired, namely, cerumen protection systems; Sound processors adapted for use with prosthetic ...