Purpose
To evaluate and compare the performance of elderly people in speech recognition tests, in silence and in noise, using hearing aids with and without the activation of the nonlinear compression algorithm (NLFC).
Methods
Forty-eight subjects were evaluated, 33 male and 15 female, ranging in age from 61 to 84 years, with mild to moderate hearing loss of descending configuration. The Lists of Sentences in Portuguese (LSP) test was applied, seeking the Sentence Recognition Threshold in Silence (SRTS), the Sentence Recognition Threshold in Noise (SRTN), expressed by the signal-to-noise ratio (S/N) and the Sentence Recognition Percentage Index in Silence (SRPIS) and in noise (SRPIN). All measurements were obtained twice: with the use of hearing aids without the activation of NLFC (SC) and with the activation of the NLFC (CC).
Results
It was found a statistically significant difference between the SRTS and PSRS obtained using hearing aids without and with CNLF, the latter being those that provided better results. In the S/N ratio and ISRN the analysis pointed no significant difference between the use of hearing aids SC and CC.
Conclusion
In the measurements obtained in silence, the hearing aids with NLFC CC presented statistically better results than with NLFC SC. In the measurements with competitive noise, it was not found a statistically significant difference between the results obtained with the use of hearing aids SC and CC. This suggests that elderly people with hearing loss of descending configuration could benefit from using hearing aids with NLFC, especially in silence.
Hearing aids; Hearing loss; High-frequency; Aged; Speech discrimination tests; Speech perception
