Open AccessSET-UP OF A KUNDT’S TUBE TO OBTAIN THE SPEED OF SOUND AT DIFFERENT TEMPERATURES.
Author(s) -
Iván Novara,
Maricel Matar,
Marianela Parodi,
A. Roatta,
B.J. Gómez,
C. Repetto
Publication year - 2019
Publication title -
anales/anales afa
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.14
H-Index - 2
eISSN - 1850-1168
pISSN - 0327-358X
DOI - 10.31527/analesafa.2019.30.2.42
Subject(s) - speed of sound , acoustics , tube (container) , adiabatic process , piston (optics) , ranging , oscilloscope , mechanics , materials science , physics , optics , thermodynamics , engineering , telecommunications , wavefront , detector , composite material
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