Assessment of Speech Intelligibility in Free-field Sound Chamber at Different Signal Noise Ratios
Journal Title: Journal of Academic Research in Medicine - Year 2020, Vol 10, Issue 2
Abstract
Objective: In the presence of background noise, understanding speech is challenging for any listener, especially for those with serious hearing loss. This study aimed to determine speech intelligibility of normal-hearing adults in quiet and noisy free fields. Methods: This study included 77 volunteers with normal hearing aged between 18 and 30 years (mean: 22.25±2.7 years). Speech intelligibility scores were determined using the non-adaptive method at different signal-to-noise ratios (SNRs) and changing the noise direction (front and rear). Results: The mean ± standard deviation of the adaptive matrix speech reception threshold in quiet for 50% intelligibility was 22.69±3 dB sound pressure level. Speech intelligibility scores obtained at -10, -5, and 0 dB SNRs were significantly different when the noise was presented from the front to rear direction (p<0.05). Better speech intelligibility scores were obtained when noise was presented from the rear. Conclusion: The standard audiometric test battery does not measure speech intelligibility in noisy environments. Therefore, speech intelligibility in the noise test developed and normalized in the native language of the patient should be used in the evaluation. Because our study was conducted in free field, the results could be used in the evaluation of patients using cochlear implants and hearing aids in free field.
Authors and Affiliations
Zahra Polat, Ahmet Ataş
Keywords
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- EP ID EP688858
- DOI 10.4274/jarem.galenos.2020.3268
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