Hearing aids; Assistive listening device for the hearing impaired; Digital hearing aids; Electric hearing aids; Electrical hearing aids; Electrically-operated hearing aids; Medical hearing instruments and parts of such devices; Parts of acoustic apparatus for the hearing-impaired, namely, cerumen protection systems; Sound processors adapted for use with prosthetic hearing devices; Wireless transmitters and receivers for use with hearing aids

Earphones; Headphones

Ear plugs not for medical purposes

electronic circuit for ambient noise reduction and abatement in an earpiece of an audio headset and an audio handset utilizing one of an analog circuit and software algorithm running on a digital signal processor, a residual microphone and a transducer