Efeitos de longo prazo da compressão de frequências na percepção de fala em adultos
Data
2014
Autores
Marchesin, Vanessa Clarizia 
Orientadores
Iorio, Maria Cecilia Martinelli
Tipo
Tese de doutorado
Título da Revista
ISSN da Revista
Título de Volume
Resumo
Introdução: Estudos anteriores demonstraram que a compressao de frequencia nao linear (CFNL) melhora a audibilidade e reconhecimento de fala em adultos e criancas. Alem disso, esses estudos nao verificaram o desempenho da CFNL a longo prazo para observar o efeito da aclimatizacao. Existe apenas um estudo publicado descrevendo os beneficios e limitacoes da CFNL em criancas (Wolfe et al, 2011). Objetivo: Verificar o efeito de longo prazo do uso de proteses auditivas com o algoritmo de compressao de frequencias em testes de percepcao de fala e em atividades de vida diaria em adultos. Metodo: Trinta e dois adultos, com idade entre 30 a 60 anos, com perda auditiva neurossensorial de grau moderado a severo com configuracao descendente foram submetidos aos seguintes testes: deteccao de sons de fala, reconhecimento de fala no silencio, o reconhecimento de fala no ruido, identificacao de monossilabos com fricativas e questionarios de auto avaliacao (HHIA e APHAB) em cinco momentos ao longo de um periodo de doze meses. Todos os participantes foram adaptados com proteses auditivas Phonak Naida III SP, modelo retroauricular (BTE) . Eles foram divididos em dois grupos pareados por idade, perda de audicao e anos de estudo. Um grupo foi adaptado com a CFNL ativada e o outro grupo foi adaptado com CFNL desativada. O teste ANOVA foi medido repetidas vezes com a utilizacao do software SPSS. Resultados: Os resultados de deteccao de som de fala, reconhecimento de fala no silencio, a identificacao do monossilabo no teste de fricativas melhorou significativamente para os pacientes com CFNL ativada. Os resultados de econhecimento de fala no ruido nao melhorou significativamente com CFNL quando comparado ao grupo sem a CFNL ativada. Ambos os grupos apresentaram melhora das pontuacoes HHIA e APHAB independentemente de estar adaptado com a CFNL ou nao. Conclusao: Estes resultados sugerem que CFNL melhora a audibilidade, deteccao e o reconhecimento de fala em altas frequencias para adultos brasileiros com perda auditiva de grau moderado a severo com configuracao descendente. Quanto maior for o periodo de aclimatizacao a tecnologia maior a melhora relacionada com a CFNL
Background: Previous studies have shown that non-linear frequency compression (NLFC) improves audibility and speech recognition for adults and children. Additionally, these studies did not examine long-term performance with NLFC following acclimatization to the frequency-compressed signal. There is only one published study describing the benefits and limitations of NLFC for children (Wolfe et al, 2011). Objective: To verify the effect of long-term use of hearing aids with frequency compression algorithm on speech perception tests and daily activities in adults. Methods: Thirty-two adults, aged 30 to 60 years, with moderate sensorineural hearing loss in low frequencies and severe high-frequency sensorineural hearing loss underwent the following tests: speech sound detection, speech recognition in quiet, speech recognition in noise, identification of monosyllables with fricatives and selfassessment questionnaires (HHIA and APHAB) five times over a twelve-month period. All participants were fitted with Phonak Naída III SP, BTE hearing aids. They were divided into two groups matched for age, hearing loss and years of study. One group was fitted with activated NLFC and the other group was fitted with deactivated NLFC. Repeated ANOVA measures were conducted using SPSS software. Results: The results of speech sound detection, speech recognition in quiet, identification of monosyllable with fricative tests improved significantly for listeners with activated NLFC. The results of speech recognition in noise did not improve significantly with activated NLFC when compared to the group with deactivated NLFC. Both groups showed improved HHIA and APHAB scores regardless of being fitted with activated or deactivated NLFC. Conclusion: These results suggest that NLFC improves audibility, detection and recognition of high-frequency speech sounds for adults with moderate to severe steeply sloping hearing loss. The longer the period of acclimatization to the technology the greater the NLFC- related improvement.
Background: Previous studies have shown that non-linear frequency compression (NLFC) improves audibility and speech recognition for adults and children. Additionally, these studies did not examine long-term performance with NLFC following acclimatization to the frequency-compressed signal. There is only one published study describing the benefits and limitations of NLFC for children (Wolfe et al, 2011). Objective: To verify the effect of long-term use of hearing aids with frequency compression algorithm on speech perception tests and daily activities in adults. Methods: Thirty-two adults, aged 30 to 60 years, with moderate sensorineural hearing loss in low frequencies and severe high-frequency sensorineural hearing loss underwent the following tests: speech sound detection, speech recognition in quiet, speech recognition in noise, identification of monosyllables with fricatives and selfassessment questionnaires (HHIA and APHAB) five times over a twelve-month period. All participants were fitted with Phonak Naída III SP, BTE hearing aids. They were divided into two groups matched for age, hearing loss and years of study. One group was fitted with activated NLFC and the other group was fitted with deactivated NLFC. Repeated ANOVA measures were conducted using SPSS software. Results: The results of speech sound detection, speech recognition in quiet, identification of monosyllable with fricative tests improved significantly for listeners with activated NLFC. The results of speech recognition in noise did not improve significantly with activated NLFC when compared to the group with deactivated NLFC. Both groups showed improved HHIA and APHAB scores regardless of being fitted with activated or deactivated NLFC. Conclusion: These results suggest that NLFC improves audibility, detection and recognition of high-frequency speech sounds for adults with moderate to severe steeply sloping hearing loss. The longer the period of acclimatization to the technology the greater the NLFC- related improvement.
Descrição
Citação
MARCHESIN, Vanessa Clarizia. Efeitos de longo prazo da compressão de frequências na percepção de fala em adultos. 2014. 179 f. Tese (Doutorado em Ciências) – Escola Paulista de Medicina, Universidade Federal de São Paulo. São Paulo, 2014.