Temporal processing, localization and auditory closure in individuals with unilateral hearing loss

Revista da Sociedade Brasileira de Fonoaudiologia

Universidade Federal de São Paulo, São Paulo, Brasil¹  Chiari, Brasília Maria¹  Vieira, Márcia Ribeiro¹  Pereira, Liliane Desgualdo¹  Nishihata, Regiane¹ 

关键词: Hearing;    Hearing loss;    Auditory perception;    Hearing tests;    Language;   

DOI  :  10.1590/S1516-80342012000300006

来源: Sociedade Brasileira de Fonoaudiologia

【 摘 要 】

PURPOSE: To assess the behaviors of temporal resolution and temporal ordering, sound localization, and auditory closure, and to investigate possible associations with complaints of learning, communication and language difficulties in individuals with unilateral hearing loss.METHODS: Participants were 26 individuals with ages between 8 and 15 years, divided into two groups: Unilateral hearing loss group; and Normal hearing group. Each group was composed of 13 individuals, matched by gender, age and educational level. All subjects were submitted to anamnesis, peripheral hearing evaluation, and auditory processing evaluation through behavioral tests of sound localization, sequential memory, Random Detection Gap test, and speech-in-noise test. Nonparametric statistical tests were used to compare the groups, considering the presence or absence of hearing loss and the ear with hearing loss.RESULTS: Unilateral hearing loss started during preschool, and had unknown or identified etiologies, such as meningitis, traumas or mumps. Most individuals reported delays in speech, language and learning developments, especially those with hearing loss in the right ear. The group with hearing loss had worse responses in the abilities of temporal ordering and resolution, sound localization and auditory closure. Individuals with hearing loss in the left ear showed worse results than those with hearing loss in the right ear in all abilities, except in sound localization.CONCLUSION: The presence of unilateral hearing loss causes sound localization, auditory closure, temporal ordering and temporal resolution difficulties. Individuals with unilateral hearing loss in the right ear have more complaints than those with unilateral hearing loss in the left ear. Individuals with hearing loss in the left ear have more difficulties in auditory closure, temporal resolution, and temporal ordering.

【 授权许可】

Unknown