Page 10 - Master Handbook of Acoustics

8 Refraction
The Nature of Refraction

Refraction in Solids
Refraction in the Atmosphere
Refraction in Enclosed Spaces

Refraction in the Ocean

9 Diffusion
The Perfectly Diffuse Sound Field

Evaluating Diffusion in a Room
Steady-State Measurements
Decay Beats
Exponential Decay

Spatial Uniformity of Reverberation Time
Geometrical Irregularities

Absorbent in Patches
Concave Surfaces
Convex Surfaces: The Polycylindrical Diffuser

Plane Surfaces

10 Comb-Filter Effects
Comb Filters
Superposition of Sound

Tonal Signals and Comb Filters
Combing of Music and Speech Signals
Combing of Direct and Reflected Sound

Comb Filters and Critical Bands
Comb Filters in Multichannel Playback

Reflections and Spaciousness
Comb Filters in Microphone Placement
Comb-Filter Effects in Practice: Six Examples
Estimating Comb-Filter Response

11 Reverberation
Growth of Sound in a Room
Decay of Sound in a Room

Idealized Growth and Decay of Sound
Calculating Reverberation Time
Sabine Equation

Eyring-Norris Equation
Air Absorption
Measuring Reverberation Time