Throughout the last fifteen years a significant development within hearing aid technology has taken place with the introduction of programmable (P-HAs) and digital signal processing (DSP-HAs) hearing instruments designed as both behind- the-ear (BTE-HAs) and in-the-ear hearing instruments (ITE-HAs). Fitting of the HA(s) in the individual subject in these aids is based on non-linear fitting algorithms using computer technology and the fitting is validated by real ear measurements also controlling the characteristics of the ear mould. Thus the frequency and amplification characteristics in the ear canal i.e. the acoustic parameters are the result of the combined system of the fitted HA and the ear mould.
KeywordsAcoustic Parameter Impaired Subject Amplification Characteristic Primary Health Care Sector Hearing Impaired Subject
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