audiometer

n. instrument that measures hearing ability

An audiometer is a machine used for testing hearing. The invention of this machine is generally credited to Dr. Harvey Fletcher of Brigham Young University. Audiometers are standard equipment at ENT clinics and in audiology centers. They usually consist of an embedded hardware unit connected to a pair of headphones and a feedback button, sometimes controlled by a standard PC. Audiometer requirements are specified in IEC 60645, ISO 8253, and ANSI S3.6 standards.
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Au·di·om·e·ter n. An electrical instrument for measuring the threshold of hearing for pure tones of normally audible frequencies generally varying [more]Audiometer - Community and Resources

Noun
1. an instrument used to measure the sensitivity of hearing
(synonym) sonometer
(hypernym) measuring instrument, measuring system, measuring device

n. audiometer, instrument that measures hearing ability