Revista Brasileira de Otorrinolaringologia
Print version ISSN 0034-7299
HENRIQUES, Marília Oliveira; MIRANDA, Elisiane Crestani de and COSTA, Maristela Julio. Speech recognition thresholds in noisy areas: reference values for normal hearing adults. Rev. Bras. Otorrinolaringol. [online]. 2008, vol.74, n.2, pp. 188-192. ISSN 0034-7299. http://dx.doi.org/10.1590/S0034-72992008000200006.
In audiology clinics, complaints about difficulties in speech recognition in noise environments are frequent, even for normal-hearing individuals. Thus, the audiologist must not only identify a hearing loss, but also analyze speech recognition, under noisy conditions similar to those found in our daily lives. AIM: Determine the reference value for the recognition of phrases under noisy conditions, in the free field, for adult normal hearing patients. MATERIALS AND METHODS: This study was carried out in 2005 and 2006. We had 150 adult normal hearing individuals participating, with ages between 18 and 64 years, assessed in a sound-proof booth. We evaluation was based on lists of phrases in Portuguese. The phrases lists were presented in the free field, in the presence of a competitive noise, at the fixed intensity of 65 dB H. The incidence angle of both stimuli was 0º- 0º azimuth. RESULTS AND CONCLUSION: The phrases recognition thresholds in the free fields were obtained in the signal to noise ratio of -8.14 dB H, which is the reference value for normal hearing individuals.
Keywords : audiology; noise; tests of speech discrimination.