Hearing aids; electrical hearing aids; assistive listening devices for the hearing impaired; hearing enhancement products, namely, electric hearing aids, electrical hearing aids, electronic hearing aids and electrically operated hearing aids; ear plugs for medical purposes; hearing aid structural parts; hearing protectors, namely, ear plugs for noise reduction; hearing muffs in the nature of ear plugs for noise reduction for protecting hearing; wireless transmitters and receivers for use with hearing aids; personal sound amplification products in the nature of hearing aids; hearing aids for the amplification of sounds for the hearing impaired; analog hearing aids; digital hearing aids; programmable hearing aids; in-ear monitors for medical purposes with ambient sound management features; in-ear monitors for medical purposes; ear molds being structural parts of hearing aids; apparatus for use in testing hearing disorders and hearing loss, namely, audiometers for medical purposes; ear plugs for hearing protection