Acousticon aid incorporating mechanical amplifier, 1920

Made:
1920

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Science Museum Group
© The Board of Trustees of the Science Museum

Acousticon aid incorporating mechanical amplifier, 1920.

Details

Category:
Sound Reproduction
Object Number:
1951-672
credit:
Hearing Aid Manufacturers Association