4 This issue is addressed partly by acceptable noise level (ANL) measure introduced by Nabelek et al., 5 in which the client rates annoyance due to background noise in the presence of speech. 3 Though these tests are sensitive to measure speech performance in noise and are administered at the time of fitting hearing aid they fail to predict real-world benefit and/or satisfaction from hearing Aids. Besides measures such as speech in noise test, quick speech in noise test, competing noise test, and hearing in noise test are being used to predict the hearing aid benefit. Unfortunately, these outcome measures are to be administered after a period of experience with hearing aid. Various outcome measures are available that consider background noise as one of the factors to have an effect on satisfaction with the hearing aid. 1 Kochkin 2 has reported that about 31% of the hearing aid users reject their hearing aid because of background noise. However, hearing aid users often complain of background noise resulting in rejection of hearing AID. ![]() In some cases of hearing losses, hearing aids can be used transitory. Hearing aid is one of the common rehabilitative measures for individuals with permanent hearing impairment. Assim, pode-se inferir que mudanças fisiológicas sutis são evidentes no tronco encefálico em uma pessoa que está disposta a aceitar o ruído em comparação com aqueles que não estão dispostos a aceitar o ruído. O resultado do presente estudo sugere que a codificação neural do som da fala no nível do tronco encefálico pode ser mediada distintamente em GHP em comparação com PHP. Embora os espectros do aparelho auditivo fossem quase os mesmos entre GHP e PHP, existem variações fisiológicas sutis no tronco encefálico auditivo. No nível do tronco cerebral, melhor codificação F0 energias de F0 e F1 foram significativamente maiores em GHP do que em PHP. Os espectros medidos em cada condição no canal auditivo foram os mesmos em GHP e PHP. No tronco encefálico auditivo, FFR foram registradas para os mesmos estímulos dos participantes. No meato acústico externo, os espectros foram medidos nas condições sem aparelho e com aparelho. Estímulos /da / e /si/ foram apresentados em alto-falante a 65 dB SPL. Cada participante foi classificado como usuário bom ou mau de prótese auditiva (GHP ou PHP) com base na medida de nível de ruído aceitável (ANL). Um total de sessenta participantes com deficiência auditiva neurossensorial moderada, com faixa etária de 15 a 65 anos foram envolvidos. ![]() ![]() Medir espectros desde a saída do aparelho auditivo no nível do canal auditivo externo e frequência de resposta (FFR) registrada no tronco encefálico de indivíduos com deficiência auditiva. A razão para a insatisfação pode estar situada em qualquer local desde o microfone do aparelho auditivo até a integridade de neurônios ao longo da via auditiva. Tem sido relatado que cerca de 31% dos usuários rejeitam seu próprio aparelho auditivo devido ao desconforto com o ruído de fundo. Os aparelhos auditivos são prescritos para aliviar a perda de audibilidade. Thus, it can be inferred that subtle physiological changes are evident at the auditory brainstem in a person who is willing to accept noise from those who are not willing to accept noise. The result of the present study suggests that neural encoding of speech sound at the brainstem level might be mediated distinctly in good hearing aid performers from that of poor hearing aid performers. Though the hearing aid spectra were almost same between good hearing aid performers and poor hearing aid performers, subtle physiological variations exist at the auditory brainstem. At brainstem level, better F 0 encoding F 0 and F 1 energies were significantly higher in good hearing aid performers than in poor hearing aid performers. Spectrum measured in each condition at ear canal was same in good hearing aid performers and poor hearing aid performers. ![]() At auditory brainstem, frequency following response were recorded to the same stimuli from the participants. At the ear canal, the spectra were measured in the unaided and aided conditions. Stimuli /da/ and /si/ were presented through loudspeaker at 65 dB SPL. Each participant was classified as either Good or Poor Hearing aid Performers based on acceptable noise level measure. MethodsĪ total of sixty participants having moderate sensorineural hearing impairment with age range from 15 to 65 years were involved. To measure spectra from the output of hearing aid at the ear canal level and frequency following response recorded at the auditory brainstem from individuals with hearing impairment. The reason for dissatisfaction can be located anywhere from the hearing aid microphone till the integrity of neurons along the auditory pathway. It has been reported that about 31% of hearing aid users reject their own hearing aid because of annoyance towards background noise. Hearing aids are prescribed to alleviate loss of audibility.
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