Modulation rate and age effect on intermittent speech recognition

• Autor(a) principal: Silva,Rayane Ferreira da
• Data de Publicação: 2021
• Outros Autores: Advíncula,Karina Paes, Gonçalves,Priscila Aliança, Leite,Gabrielle Araújo, Pereira,Liliane Desgualdo, Griz,Silvana Maria Sobral, Menezes,Denise Costa
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista CEFAC (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-18462021000200501
• topic: Hearing; Aged; Speech Discrimination Tests; Speech Perception; Speech

ABSTRACT Purpose: to investigate the auditory recognition of intermittent speech in relation to different modulation rates and ages. Methods: 20 young people, 20 middle-aged adults, and 16 older adults, all of them with auditory thresholds equal to or lower than 25 dB HL up to the frequency of 4000 Hz. The participants were submitted to intermittent speech recognition tests presented in three modulation conditions: 4 Hz, 10 Hz, and 64 Hz. The percentages of correct answers were compared between age groups and modulation rates. ANOVA and post hoc tests were conducted to investigate the modulation rate effect, and the mixed linear regression model (p < 0.001). Results: regarding the age effect, the data showed a significant difference between young people and older adults, and between middle-aged and older adults. As for the modulation rate effect, the indexes of correct answers were significantly lower at the slower rate (4 Hz) in the three age groups. Conclusion: an age effect was verified on intermittent speech recognition: older adults have greater difficulty. A modulation rate effect was also noticed in the three age groups: the higher the rate, the better the performance.