Page 17 - The Master Handbook Of Acoustics

xvi CONTENTS

ASHRAE 389
Machinery Noise 390
Air Velocity 390
Effect of Terminal Fittings 391
“Natural” Attenuation 391
Duct Lining 392
Plenum Silencers 393
Packaged Attenuators 394
Reactive Silencers 394
Resonator Silencer 395
Duct Location 395
Some Practical Suggestions 395

Chapter 19 Acoustics of the Listening Room 399

The Acoustical Link 399
Peculiarities of Small-Room Acoustics 400
Room size 401
Room proportions 401
Reverberation time 403
The Listening Room: Low Frequencies 403
Control of modal resonances 406
Bass traps for the listening room 406
Modal colorations 408
The Listening Room: The Mid-High Frequencies 409
Identification and treatment of
reflection points 411
Lateral reflections: Control of spaciousness 413

Chapter 20 Acoustics of the Small Recording Studio 415

Acoustical Characteristics of a Studio 416
Reverberation 418
Studio Design 419
Studio Volume 419
Room Proportions 421
Reverberation Time 422