Serviços Personalizados
Journal
Artigo
Indicadores
Citado por SciELO
Links relacionados
Similares em SciELO
Compartilhar
Anales (Asociación Física Argentina)
versão impressa ISSN 0327-358Xversão On-line ISSN 1850-1168
Resumo
NOVARA, I. et al. Adaptación de un tubo de Kundt para la determinación de la velocidad del sonido a distintas temperaturas. An. AFA [online]. 2019, vol.30, n.2, pp.42-46. ISSN 0327-358X.
In this work we describe how we designed and built an acoustic system that allowed us to adapt a Kundt's tube for the measurement of the speed of sound at different temperatures. The air column inside the tube was excited by a speaker at a frequency of 2 kHz. We changed the air column length by moving a piston throughout the tube, and we measured and recorded that length when we observed a resonance signal on the oscilloscope screen. This procedure was repeated at different temperatures, ranging from 19°C to 115°C. Then it was calculated the propagation of the speed of sound based on the temperature. The results were compared with those predicted by the classical model, which assumes that air is an ideal diatomic gas, and that the acoustic phenomenon is an adiabatic process. Finally, it was found a satisfactory agreement between the experimental values and those predicted by the classical model.
Palavras-chave : speed of sound; Kundt's tube; resonance.