# Intuition of sound wave impedance and admitance

The impedance of a soundwave is given by both: $$\frac{\mathcal{P}}{V}=\rho_0c$$ Where $$\mathcal{P}$$ is the pressure wave, $$V$$ is the velocity vector of particles, $$\rho_0$$ is the static value of the gas density and $$c$$ is the speed of sound\wave. It is very easy for me to understand an impedance in an electrical circuit. The impedance of a capacitor is a measure of how will a capacitor influence the current (flow of electrons through a conductor). In particular, impedance is the negative influence on the current while admittance is a positive influence.

Is there an intuitive explanation with respect to a sound wave? Looking at the $$\rho_0c$$ term it seems to me that this is a medium-wise constant value. Is that correct? Is there another\better intuition?

• The electrical analogy is that pressure is like voltage (or E-field in an electromagnetic wave) and velocity is like current (or H-field). – Puk Jun 15 at 19:14