Use of mechanical coupler
for audiometer calibration.

Measurements of hearing by pure tone audiometry are made traceable through the calibration of ear simulators. However, new techniques such as oto-acoustic emission and evoked response audiometry, while they may have been around for some time, are now seeing routine use in screening and diagnosis of hearing defects, and revolutionising hearing measurement on a national scale.

In addition to maintaining standards and measurement services for audiometry, NPL also provides input to the working groups of international and national standards bodies and is aiding development of internationally standardised methods for testing DSP hearing aids.

We have prototype facilities to demonstrate the principles of providing traceability for objective audiometry applications, and to demonstrate the principles of providing traceability for telecommunications applications.

For more information, please contact Richard Barham.