What is 'Calibrate for Open Fit'?

10 mins
04 April 2016


The “calibrate for open fit” is used when fitting an open fit hearing aid. It prevents sound leaking from the ear and picked up by the reference microphone during aided measurements. It is performed after the Real-ear unaided gain (REUG) in real ear insertion gain measurements and it is performed as the first measurement in real ear aided response measurements. 

It consists of a single step. The hearing aid is placed its correct position on the ear and the hearing aid must be switched off or muted (with the help of hearing aid fitting software). Once in position the calibrate for open fit measurement can be run. 

After the calibration for open fit has been performed, the hearing aid gets switched on (unmuted) and immediately afterwards, the real-ear aided response (REAR) measurements can be performed without the patient moving between these actions.

Related course: Getting started: Real ear measurements


Michael Maslin
After working for several years as an audiologist in the UK, Michael completed his Ph.D. in 2010 at The University of Manchester. The topic was plasticity of the human binaural auditory system. He then completed a 3-year post-doctoral research program that built directly on the underpinning work carried out during his Ph.D. In 2015, Michael joined the Interacoustics Academy, offering training and education in audiological and vestibular diagnostics worldwide. Michael now works for the University of Canterbury in Christchurch, New Zealand, exploring his research interests which include electrophysiological measurement of the central auditory system, and the development of clinical protocols and clinical techniques applied in areas such as paediatric audiology and vestibular assessment and management.

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