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The simplified French Matrix. A tool for evaluation of speech intelligibility in noise
I Prang1, M Parodi1, C Coudert1
1Service d'ORL et de chirurgie cervico-faciale, hôpital Necker-Enfants-Malades, 149, rue de Sèvres, 75015 Paris, France.
Introduction:
In audiology, the usual tests of speech perception in silence are non-predictive of intelligibility in noise. The French Matrix was developed to assess intelligibility in noise in adults with normal cognitive capacity. A simplified adaptive version, FRA-SIMAT, was derived for use with children and elderly persons with diminished memory span. The aim of the present study was to apply this adaptive procedure to determine signal-to-noise ratio (SNR) according to percentage intelligibility.
Methods:
Twenty normal-hearing adults and 60 normal-hearing children aged 5-6 years (G1), 7-8 years (G2) and 9-10 years (G3) were included. FRA-SIMAT uses groups of 3 words, to limit memory demand.
Results:
In adults, SNR for 50% (SNR-50) and 80% intelligibility (SNR-80) was respectively -7.1±1.4dB and -3.7±1.6dB. In children, SNR-50 was -4.2±1.3dB in G1, -4.6±1.2dB in G2, and -5.5±1.5dB in G3.
Conclusion:
The FRA-SIMAT test of speech perception in noise was validated in adults and children of different ages, and can be implemented as a diagnostic and rehabilitation tool in clinical practice.
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