OBJETIVO: investigar a correlação existente entre os limiares tonais e os Limiares de Reconhecimento de Sentenças no Silêncio (LRSS) e verificar, se é possível, através do audiograma estabelecer um prognóstico deste paciente sobre a sua habilidade de reconhecer a fala. MÉTODOS: foram analisados 42 indivíduos com perda auditiva coclear de grau moderado, 18 do sexo feminino e 24 do masculino, com idades entre 41 e 76 anos. Primeiramente foi realizada avaliação audiológica básica e, em seguida, a pesquisa dos Limiares de Reconhecimento de Sentenças no Silêncio, em campo livre, por meio do teste Listas de Sentenças em Português. RESULTADOS: a análise estatística evidenciou correlação significante entre o limiar de reconhecimento de sentenças no silêncio e a média das freqüências de 0,5, 1 e 2 kHz. Por sua vez, ao correlacionar os Limiares de Reconhecimento de Sentenças no Silêncio com a média das freqüências de 3, 4 e 6 kHz, não houve correlação significante. CONCLUSÃO: o prognóstico provável da habilidade de reconhecimento de fala no silêncio, pode ser feito apenas com base nos limiares das freqüências de 0,5, 1 e 2 kHz em perdas auditivas cocleares.

SUMMARYIntroduction: In daily routine from the audiologists, the complaints are frequent about the difficulty of understanding of speech in a noisy environment. Audiologic tests that use the sentences as stimulus, have been objects of research, because besides check the real hearing abilities from the patient, provide a direct approach with situations of communications and provide information that will guide the more adequate conduct to be indicated for the individual with hearing complaints. Objective: Determine the thresholds of recognition of sentences in silence and the relation sign/noise in a group of individual carriers of the bilateral neurosensory hearing loss and symmetric from moderate degree. Method: Retrospective study, clinic and experimental. Were evaluated 50 individuals, being 16 adults of middle age and 34 elderly. Was performed a anamnesis and the basic audiological evaluation. Posteriorly, using the test of List of Sentences in Portuguese, was performed the research of the thresholds of recognition of sentences in silence and the relation sign/noise with a fixed level of noise of 65 dB NPS(A). Results: The average LRSS obtained for all subject was of 60,90 dB NPS (A), and the average of relations S/R was of +3,20 dB NPS (A). Conclusion: The analysis of variables allowed to obtain the average LRSS, affirm that it had correlation with the triton mean of the better ear from subjects and that the threshold of audibility seems to be the only parameter to influence the recognition in the silence. Besides, make it possible to obtain of the mean of relations S/R, which demonstrate the difficulty that the individual with hearing loss present in noisy environment.

The identification of dead regions in the cochlea is used to obtain better results in the process of selection and fitting of hearing aids because the pieces of information generated by inner hair cells to the auditory nerve are important to better identify sounds, mainly those related to speech.

A good audiologic diagnosis is increasingly more important in the practice of audiology, in order to understand patients' needs for selection and fitting of hearing aid devices. Aim: Show recent literature that mention the concept of cochlear dead regions, diagnostic strategies and its relevance in the process of selection and fitting of hearing aids. Methods: to carry out a bibliographical survey on dead cochlear regions. Dead cochlear regions were described as regions where inner hair cells and/or adjacent neurons do not work. Therefore, in these regions, the information generated by basilar membrane vibration is not transmitted to the central nervous system. However, a tone at a frequency correspondent to that of dead regions, provided it being sufficiently intense, can be perceived in regions near this zone where inner hair cells and/ or nervous fibers still work. Conclusion: The identification of dead regions in the cochlea is used to obtain better results in the process of selection and fitting of hearing aids because the pieces of information generated by inner hair cells to the auditory nerve are important to better identify sounds, mainly those related to speech.