ear trumpets

quack

3/4grilleearside
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image of ear trumpet
c 1875
image of ear trumpet
c 1915
image of ear trumpet
c 1920
image of ear trumpet
c 1950

I have used this term to apply to items that were sold to improve hearing but were absolutely useless.

Also include are 2 items intended to deceive the unwary buyer on Ebay.

The battery powered noise maker was supposed to exercise one's hearing !
4 examples