Amplificador de voz: efeitos na dose e na intensidade vocal de professoras sem disfonia

Abstract

Objectives: Analyze the interference of using the voice amplifier in vocal dose of non-dysphonic teachers. Methods: This is an experimental study comparing people from the same ambience compound for 20 teachers from elementary school at municipal service in Belo Horizonte/MG. After participants’ consent, they were requested to answer the vocal symptom scale questioner (ESV) and later participated from two different moments of the study which was automatically selected. In the first moment, the participants used only the vocal dosimeter and in the second, they used the vocal dosimeter and the voice amplifier. The measurements were recorded by the device for 1h40m, in the classroom that the teachers taught. The time between the two measurements was one week, with the same room, the same time and the same discipline being taught, at both times. Results: The intensity parameter was the only one that showed difference with the use of the voice amplifier. Conclusion: Use voice amplification while non dysphonic teachers are teaching doesn’t affect the fundamental frequency and vocal dose measure in the acoustics parameters. The vocal intensity is smaller when teacher uses the vocal amplification