Development and evaluation of the British English Coordinate Response Measure Speech-In-Noise Test as an occupational hearing assessment tool

Abstract

Objective: The studies described in this paper outline the design and development of a British English version of the coordinate response measure (CRM) speech-in-noise (SiN) test. Our interest in the CRM is as a SiN test with high face validity for occupational auditory fitness for duty (AFFD) assessment.

Design: Study 1 used the method of constant stimuli to measure and adjusted the psychometric functions of each target word, producing a speech corpus with equal intelligibility. After ensuring all the target words had similar intelligibility, for studies 2 and 3 the CRM was presented in an adaptive procedure in stationary speech-spectrum noise to measure speech reception thresholds and evaluate the test-retest reliability of the CRM SiN test.Study sample: Studies 1 (n=20) and 2 (n=30) were completed by normal-hearing civilians. Study 3 (n=22) was completed by hearing impaired military personnel.Results: The results display good test-retest reliability (95% confidence interval < 2.1 dB) and concurrent validity when compared to the triple-digit test (r = < 0.65) and the CRM is sensitive to hearing impairment.

Conclusion: The British English CRM using stationary speech-spectrum noise is a ‘ready to use’ SiN test, suitable for investigation as an AFFD assessment tool for military personnel.

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