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Mätmetoder för hörapparater med öppen anpassning. Lise Holmén-Fors 2006 Sammanfattning

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Mätmetoder för hörapparater med öppen anpassning.

Lise Holmén-Fors 2006

Sammanfattning

SYFTE: Att jämföra några olika mätmetoders förstärkningsresultat uppmätta för hörapparater med öppen anpassning. Nuvarande hörapparatanpassningar är inte gjorda för öppna anpassningar. DESIGN: Jämförelsestudie. FÖRSÖKSOBJEKT:

Fyra hörapparater med öppna anpassningar mätta med KEMAR, ear simulator med öppen coupler och hörselgångsmätning (REIG) med substitutionsmetoden.

RESULTAT: Oftast observerades knappt någon förstärkning vid 0,5 kHz oavsett mätutrustning. Förstärkningen var som störst vid frekvensen 3 kHz oavsett

mätutrustning. I motsats till ICRA 5 ger ICRA 1 likvärdiga mätresultat oberoende av vilken mätutrustning som användes. Skillnaden mellan KEMAR med ICRA 5 och ear simulator med ICRA 5 är signifikant i förstärkning mellan frekvenserna 3–6 kHz. SLUTSATS: Mätning med ear simulator är den mätmetod som ger mest förstärkning. KEMAR ger ett resultat som liknar hörselgångsmätning med

substitutionsmetoden.

Measurement methods for hearing aids with open fittings.

Abstract

OBJECTIVE: To compare some different measurement methods for gain on hearing aids with open fittings. EXPERIMENTAL DESIGN: Comparative study.

MATERIALS: Four hearing aids with open fittings measured with KEMAR, ear simulator with open coupler and real-ear-measurements (REIG) with substitution method. RESULTS: It was often observed that there was scarcely any gain at 0.5 kHz irrespective of measurement method. The most gain was found at 3 kHz irrespective of measurement method. As opposed to ICRA 5, ICRA1 gives equally valuable results independent of measurement equipment. The difference between KEMAR with ICRA 5 and ear simulator with ICRA 5 is the significant difference in gain in the frequency interval 3-6 kHz. CONCLUSION: Ear

simulator gives the most gain of the measurement methods. KEMAR gives results similar to real-ear-measurements with the substitution method.

References

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