Parts of acoustic apparatus for the hearing-impaired, namely, cerumen protection systems comprised of earwax guards; ear trumpets; digital hearing aids; hearing aids; sound tuning apparatus of hearing aids; ear moulds for hearing aids; hooks for hearing aids; ear plugs for hearing aids; brushes for hearing aids; structural parts and fittings for hearing aids; cords for hearing aids; analog hearing aids; medical apparatus and instruments, namely, wireless transmitters and receivers for use wit...