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Abstract
Abstract
Objective. The objective of the study was to determine the speech perception abilities for spectrally modified speech signals in individuals with auditory dys-synchrony. Study Sample. The speech identification scores of 30 normal hearing and 12 individuals diagnosed as having auditory dys-synchrony were studied. Design. Phonemically balanced words in Kannada developed by Citation were presented unfiltered and filtered at 1700 Hz low-pass and 1700 Hz high-pass cut-off frequencies, and speech identification performance was assessed. Results. Results revealed that there is a highly significant difference in speech identification scores for unfiltered and low-pass filtered words. This difference could be attributed to the physiological coding deficits of low frequency information which are usually coded by phase locked responses in auditory nerve fibers (Citation). Conclusions. Thus, low-pass filtered words can be used as an effective tool to identify individuals with auditory dys-synchrony, especially those who have good speech identification scores in quiet.
Sumario
Objetivo. El objetivo de este estudio fue determinar las habilidades de percepción del lenguaje con señales de lenguaje espectralmente modificadas en sujetos con disincronía auditiva. Muestra de Estudio. Se estudiaron las puntuaciones de identificación de lenguaje de 30 normo-oyentes y de 12 individuos con diagnóstico de disincronía auditiva. Diseño. Se presentaron palabras fonéticamente balanceadas en Kannada, desarrolladas por Citation sin filtro y con filtro pasa/bajo de 1700 Hz y filtro pasa/alto de corte de frecuencias de 1700 Hz, y se evaluó el rendimiento en la identificación del lenguaje. Resultados. Los resultados revelan que existe una diferencia significativa muy alta en las puntuaciones de identificación de lenguaje para palabras no filtradas y con filtro pasa bajo. Esta diferencia puede ser atribuida al déficit fisiológico de codificación de la información e bajas frecuencias, que usualmente se codifican como respuestas con bloqueo de fase en las fibras del nervio auditivo (Citation). Conclusiones. Por lo tanto, las palabras filtradas pasa bajo pueden usarse como una herramienta útil para identificar personas con disincronía auditiva, especialmente aquellas que tienen buenas puntuaciones para la identificación de lenguaje en silencio.
Acknowledgements
The authors would like to thank Dr. Vijayalakshmi Basavaraj, Director, All India Institue of Speech and hearing for permitting us to carry out the study. The authors would like to thank Dr. Asha Yathiraj, Professor of Audiology for permitting us to use the test material. The authors would also like to thank all the participants of the study for their co-operation.
Declaration of interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.