Influência do ruído de fundo da sala de aula na escrita de sentenças, em crianças de 4ª série do ensino fundamental

• Autor(a) principal: Silva, Fernanda Pereira da
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da PUC_SP
• Texto Completo: https://tede2.pucsp.br/handle/handle/11891
• topic: Ruído; Noise; CNPQ::CIENCIAS DA SAUDE::FONOAUDIOLOGIA

For learning to occur satisfactorily, the teacher's voice should be intelligible to all children. However, the acoustic environment present in most classrooms, not always allow for good speech recognition, which may have a negative impact on developing psycho-educational and social development. Therefore, the main objective of this study was to evaluate the influence of background noise in the classroom writing sentences in children aged 4 th. grade of elementary school. The specific objectives were to evaluate the performance of children from 4th. series for writing sentences presented in the S / R, first only with the value found in the classroom during the measurements, and later, with an increase of 5 dB. This study was performed to measure the level of background noise in the classroom of a private school located in the city of Imperatriz-MA, this measurement being taken across the Level Meter Sound Pressure type model RadioShack Digital Sound Level Meter. In order to establish the signal to noise ratio that students are exposed to in day-to-school day was measured sound pressure level of the teacher's voice. The sample of students consisted of 29 children regularly enrolled in 4th grade. Were presented two lists containing 10 sentences each, through a sound system. The measured results showed that the level of background noise ranged from 58.0 dB (A) (Leq) to 63.0 dB (A) (Lmax) at the various points measured. Since the teacher's voice wavered between 67 and 70 dB (A). Taking these findings into consideration, we established a S / N ratio for this class of +7 dB (A). Therefore, the signal to noise ratio applied in the first list of sentences was +7.0 dB (A), passing this value in the second list to be +12.0 dB (A). It was found that the improvement in speech recognition was statistically significant for SNR +12 dB (A) both for hits and for correct words to phonemes. In the analysis for the errors of word and phoneme omission of words, it was observed that there was a decrease in total errors for the 13 list, compared to 12 list for most of the students assessed. Thus, we conclude that noisy classrooms can affect speech recognition on the part of students, since the noise masks primary acoustic cues for this task