Assistive listening device for the hearing impaired; Digital hearing aids; Ear plugs for hearing protection; Ear plugs for noise reduction; Ear plugs for sleeping; Ear plugs for soundproofing; Ear plugs for soundproofing, other than for medical use; Ear plugs for swimmers; Ear plugs for swimming; Ear plugs for swimming purposes; Electric hearing aids; Electrical hearing aids; Hearing aids; Hearing aids for the deaf; Wireless transmitters and receivers for use with hearing aids