Sound pressure, particle velocity, velocity potential, sound intensity

Impedance, absorption, transmission, diffraction, scattering, diffusion

Can be obtained by measurements or by modeling. In this book, the focus is on modeling.

$c=343 \frac{m}{s}$

Linearized wave-equation

$\nabla^2 p - \frac{1}{c^2}\frac{\partial^2 p}{\partial t^2} = 0$

Helmholtz equation

Some non-linear terms are still important:

Function of humidity frequency both (3D surface)

Temperature: Winter Sauna C

Pressure: Mount Everest Beach at Dead Sea mbar

Directivity

Human listener vs. microphones

© 2016 Lauri Savioja