otophone

n.

助听器；奥多风；

Miscellaneous: Maloney's otophone
The otophone : An instrument for reading by ear: E. E. Fournier d'Alse. (Nature, May 6, 1920)
Schallwellenfilter für Otophone
Method for fabricating micro speaker and micro speaker fabricated by the same
Method for fabricating micro speaker and micro speaker fabricated by the same
Bone Conductive Device in Treatment of Conduction Deafness
Telephone
Phonetography in voice diagnoses
The phonetogram.
The phonetogram