The best replacement for hearing aid is cochlear implant.

The best alternatives to hearing aid are rated as following:
★★★★★  cochlear implant
★★★  amplifier
★  hearing amplifier
★  baha
★  hearing aide
★  sound amplifier
★  fm system
  implant
  hearing aids
  personal sound amplifier
  cochlear implants
  stapedectomy
  grommets
  hearing devices

Your alternative for hearing aid is not listed? Suggest!
Speaking about hearing aid, one probably shouldn't forget about telecoil.

Other search terms related to hearing aid and their ratings are:
★★★★★ telecoil
★★ tinnitus masker
★ hearing test
You have in mind a companion for hearing aid and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of hearing aid in all years. Click on graph for more.
hearing aid
cochlear implant
amplifier