Speech in noise discrimination in young people with normal hearing from Córdoba
Abstract: The difficulty to discriminate speech in noise (SND) is a common auditory symptom, which affects both hearing impaired individuals and those with hearing within normal parameters. However, in our region this difficulty is evaluated only in subjects who are prescribed with he...
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| Autores principales: | , , , , , , , |
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| Formato: | Artículo revista |
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Universidad Nacional Córdoba. Facultad de Ciencias Médicas. Secretaria de Ciencia y Tecnología
2021
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| Acceso en línea: | https://revistas.unc.edu.ar/index.php/med/article/view/34903 |
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| Sumario: | Abstract:
The difficulty to discriminate speech in noise (SND) is a common auditory symptom, which affects both hearing impaired individuals and those with hearing within normal parameters. However, in our region this difficulty is evaluated only in subjects who are prescribed with hearing aids.
The objective was to describe the SND in young university students with normal hearing from Córdoba between 2020 and 2021.
A descriptive cross-sectional correlational study was carried out. Thirty-three students between the ages of 20 and 30 with normal audiometry participated. Those who presented external and / or middle ear alteration were excluded. The SND assessment was performed using bisyllables, one intonational group sentences (OIGS) and consonants in vowel context (VCV) from the BEPPA Battery. They were recorded in a CINTRA soundproof chamber, by a professional female speaker and masked using noise with a speech-like spectrum. The signals were reproduced by a digital audiometer. Verbal stimuli were presented at 60dB in diotic form, varying the noise level.The evaluations were carried out under the following conditions: no noise, with noise to signal-to-noise ratio (SNR) of 5dB, 0dB and -5dB. Wilcoxon Test was applied to compare intelligibility in the different conditions. There was no conflict of interest. The work was approved by the ethics committee of the Hospital Nacional de Clinicas.
It was observed that the discrimination percentages decreased as the SNR decreased for the three types of stimuli. In bisyllables and OIGS, significant differences (p <0.05) were observed for all SNR conditions. In VCV, significant differences were observed between SNR 5, 0 and -5dB, but not between the condition without noise and SNR 5dB (p> 0.05). In SNR -5dB OIGS obtained the highest discrimination percentage with 70%, followed by VCV (55%) and bisyllables (37%). In conclusion, results showed that the SND in this group of normal listeners is evidenced mainly from a SNR -5dB, and that the noise used hinders to a greater extent the discrimination of bisyllables and to a lesser extent the discrimination of OIGS. It is necessary to continue with research on this topic to promote the inclusion of SND evaluation in the audiological clinic of our region.
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