French edit

Etymology edit

From the trademark Sonotone, manufacturer of hearing aids from 1929 to 2005.

Noun edit

sonotone m (plural sonotones)

  1. Synonym of audioprothèse

Further reading edit

Spanish edit

Etymology edit

From the trademark Sonotone, manufacturer of hearing aids from 1929 to 2005.

Noun edit

sonotone m (plural sonotones)

  1. hearing aid
    Synonym: audífono

Further reading edit