Medical Antiques > Medical Therapeutic Instruments

Brass Ear Trumpet Hearing Aid.

Item#: MET437

SOLD

 

Brass Ear Trumpet Hearing Aid. The ear trumpet consists of a cylinder 8 cm long, an external L shaped brass-hearing tube is inserted inside the cylinder into an inverted funnel that flares out facing into the cyllinder. This type of acoustic arrangement strongly resonants in the speech frequency. The trumpet has some old soldering corrections.