Hearing testing device, 1999.

 
Hearing testing device, 1999.
4 0 c m
 
33cm
actual image size: 25cm x 32cm

Description

Doctors use these devices to test hearing using 'extremely quiet' ear sounds. For example, this can be used to test the hearing of new-born babies, months before traditional tests are posible. This is because the equipment is digital, portable, reliable and inexpensive.

Image Details

Image Ref.
 
10328793

© Science Museum / Science & Society Picture Library

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