Asra Curve User Guide V9
27/05/2021
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4.
Introduction
The ASRA Curve Audiometer is a medical device used to screen subjects for noise induced hearing
loss.
It is intended that the ASRA Curve will be used as part of a hearing screening program in industrial
and corporate environments. The hearing screening will measure the hearing threshold of a test
subject and indicate the need for further clinical analysis and treatment. The ASRA Curve is a stand-
alone product and is not intended to be used with other medical devices.
The operator of the ASRA Curve is expected, as a minimum, to be a competent person. Competent
persons have completed courses with syllabi determined by the British Society of Audiology. These
courses familiarise them with audiology, the methods of performing hearing testing and how to
operate and maintain audiometers. Other users may be more skilled experts in audiology, such as
Occupational Health nurses and audiologists.
The subject, upon whom the hearing testing is performed, is expected to be an employee working in
high-
noise environments being screened in line with the Health and Safety Executive’s regulations
on noise at work or being routinely screened as a part of a workplace health programme.
Subsequently, they come from all walks of life and are of working age.
The ASRA Curve audiometer is expected to be used in an environment suitable for the conduction of
hearing testing. Most likely a quiet office or a room fitted out with a hearing test booth.
The process follows the British Society of Audiology approved procedures for the determination of
Pure Tone thresholds, using the Hughson Westlake technique. The headphones rest on the outside
of the head of the test subject and shall transfer sound energy to the subject by air conduction. The
subject holds the remote switch and presses it when tones are heard.
Once thresholds have been determined for both ears on selected frequencies, and the age and
gender of the subject being tested has been input, the audiogram is categorised according to the
Health & Safety Executive categorisation scheme.
