Study of correlation between Speech Intelligibility Index (SII) and speech recognition percentage index

Abstract

Introduction: Hearing is one of the noblest senses, since its main function is linked to the acquisition and development of oral language, essential in interpersonal relations and with the environment. The impact of hearing sensory deprivation interferes with the ability to interpret speech sounds. Purpose: Check if there is a correlation between the values of Speech Inteligibility Index (SII) and Word Recognition (WR). Method: The data obtained in the records of 55 elderly of both sexes, with bilateral sensorineural hearing loss of moderate to severe, users of hearing aids accompanied in the auditory health service of Hospital São Paulo, were evaluated. The SII values obtained in the verification of the hearing aid gain in the Verifit ® Audioscan equipment and the IPRF values for monosyillabic stimuli were analysed. After data collection, the results were submitted to statistical analysis. Results: The hearing losses were classified as to the degree (moderate and severe). The values of SII and IPRF were characterized by ear (right and left). The mean of WR was 72,56% in the right ear and 73,85 % in the left ear. The mean of SII was 58,44 % in the right ear and 59,73 % in the left ear.There were certain equations for the classification of hearing loss according to groups and equations for determining the values of SII and IPRF, according to each ear. Conclusion: There was a weak correlation between the values of SII and of WR obtained with monosyllabic stimuli in the elderly with hearing loss of moderate to severe degree.