Reconhecimento de sentenças no silêncio e no ruído de indivíduos jovens adultos normo-ouvintes em campo livre

Abstract

At the present moment, tests using sentences as stimulus in the noise presence have been applied thoroughly in researches in the Audiology’s area, because they evidence to the patient's auditory ability real in communication situations of the day-by-day. In Brazil, the test proposed by COSTA (1998), constituted by Lists of Sentences in Portuguese (LSP), it have being applied with different populations and objectives, looking for to establish parameters for its application in the clinical routine. On this way, the objective of this research was determinate the thresholds of recognition of sentences in soundfield, with and without the presence of competitive noise. The group of this study was constituted of 80 normal hearing young adult individuals, 40 males and 40 females, with age 18 to 35 years. All the individuals were submitted at an interview, basic audiology evaluation and the LSP test. The application of the test followed the ascendingdescending strategy (Levitt & Rabiner, 1967). The Thresholds of Recognition of Sentences in the Silence (LRSS) and in the Noise (LRSR) were obtained in different hearing conditions in soundfield, at first in the binaural condition (both ears), and after, in the monaural condition - right ear and left ear. In the research of LRSR, was fixed a noise level of 65 dB A. The obtained results showed significant difference statistically, considering the gender, only among LRSS in the binaural condition, being the females result (22.21 dB A) better than the males (23.90 dB A). In the monaural condition, the LRSS for the 80 evaluated individuals, were 24.17 dB A to the left ear and 25.59 dB A to the right ear. The signal/noise relationship found in the binaural condition, right ear and left ear, were respectively of - 8.72, - 5.76 and - 7.10 dB.