I Room Acoustics (UNDER CONSTRUCTION)

I.1 Introduction to Room Acoustics
I.1.1 Basic concepts
Sound pressure, particle velocity, velocity potential, sound intensity

I.1.2 Reflection of sound
Impedance, absorption, transmission, diffraction, scattering, diffusion

I.1.3 Room acoustic responses
Can be obtained by measurements or by modeling. In this book, the focus is on modeling.

I.1.3.1 Impulse response
I.1.3.2 Time-energy response
I.1.4 Wave equation

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

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:

I.1.5 Air absorption

Function of humidity frequency both (3D surface)
Temperature: Winter Sauna C
Pressure: Mount Everest Beach at Dead Sea mbar

I.2 Introduction to Room Acoustic Modeling
I.2.1 Source – Medium – Receiver model
I.2.1.1 Sound Sources
Directivity

I.2.1.2 Receivers
Human listener vs. microphones

I.2.2 Room acoustic attributes
I.2.3 Auralization
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© 2016 Lauri Savioja