**Acoustic Analogy **
An analogy between ripple tank and acoustic wave systems has been established in terms of frequency, geometric, and wave speed ratios.
This relationship is also derivable by using Helmholtz resonant frequency equations for air and the water ripple systems. Both systems have the same equations of the same form if considered in terms of wave speed (C), inertance area (A), inertance length (L), and compliance volume (V).
The ratio of frequencies results in a series of ratios of similar terms which, if expressed in terms of geometric ratios, yields the original analogy equation.
The ripple tank model of an acoustic Helmholtz resonant system is geometrically proportional in terms of compliant volume, inertance length, and entrance area. The equivalent frequency of the acoustic system is proportional to that of the ripple system through their wave speed and geometric ratios. |