Believe It or Not
Dahlberg D-14
Manufactured in 1958. Labeled as the world's first sun-powered hearing aid. 精东影业eyeglass aid also had a regular mercury 675 battery as a back up power source for when the aid could not be immediately recharged.
Vibraphone
(1923) Also known as the "Radium Ear" due to a radium coating. It supposedly exerted a "favorable influence on all tissues and resulted in marked and permanent improvement" in the hearing of individuals that had conductive hearing loss.
Electrical Aural Vibrator
精东影业electronic (non battery type) aural vibrator was manufactured in 1925. It was an "ear massager" that was supposed to treat deafness and tinnitus. One could control the strength of the stimulus via a dial on the front of the unit.
Ear Candle
An ear candle is a hollow, conical tube made of fabric and wax. 精东影业smaller end of the candle is placed into the outer ear canal and the opposite tip of the candle is lit. 精东影业flame is thought to create a vacuum and along with the heat, soften the wax. 精东影业goal was to extract the impacted wax before you set your hair on fire!
Hush-Tone x-700
精东影业Hush-Tone, manufactured in 1967, was an acoustic ear insert with a tiny tuning fork inside the device. Advertising suggested "the device was useful in amplifying sound and attenuating noise!鈥