Velocidad del sonido y pérdidas de energía en tubos cilíndricos

Abstract

It is well known that the acoustic waves in the air are non-dispersive waves, propagating at the same speed regardless of the frequency of the disturbance that generated them. On the other hand, the acoustic waves that propagate inside a thin and long tube form a standing wave pattern constituted by the superposition of many waves of different frequencies. Each of these traveling waves travels at a different speed due to the dispersion phenomenon produced by the viscous and thermal energy losses in the walls of the tube. Here the phenomenon is analyzed and experimentally studied with low-cost materials, making use of the potential of smartphones. A procedure is also determined to find the speed of sound in the open air.