Handbook for Sound Engineers, 5th Edition

Chapter 8

Acoustical Treatment for Indoor Areas

by Jeff Szymanski

8.1  Acoustical Treatment Overview

8.2  Acoustical Absorption

8.2.1  Absorption Testing

8.2.1.1  Reverberation Chamber Method

8.2.1.2  Impedance Tube Testing Methods

8.2.1.3  Other Absorption Testing Methods

8.2.1.4  Absorption Ratings

8.2.1.5  Interpreting Test Results

8.2.2  Porous Absorbers

8.2.2.1  Mineral and Natural Fibers

8.2.2.2  Acoustical Foams

8.2.2.3  Acoustical Tiles

8.2.2.4  Spray and Trowel Applied Treatments

8.2.2.5  Carpet and Draperies

8.2.3  Discrete Absorbers

8.2.3.1  People and Seats

8.2.3.2  Acoustical Baffles and Banners

8.2.3.3  Other Furnishings and Objects

8.2.4  Resonant Absorbers

8.2.4.1  Membrane Absorbers