Acoustics and Psychoacoustics, 5th Edition

 

Appendix 6: The Effect of Surface Size and Illumination on the Polar Pattern

Chapter Contents

• A6.1 An Array of Point Sources
  • A6.1.1 The Visible Region
  • A6.1.2 The Effect of Sampling
  • A6.1.3 The Effect of a Progressive Phase Shift
• A6.2 Application to Diffuser Design
• A6.3 Application to Array Loudspeakers
  • A6.3.1 Acoustic Spatial Filtering
• A6.4 Application to Constant-Directivity Horns
• A6.5 The Effect of Mouth, or Array, Size, on Beamwidth
  • A6.5.1 The Minimum Beamwidth Frequency as a Function of Size
• References

In order to understand how the properties of sequences or the size of a loudspeaker affect polar performance, we must first look at some theory behind array polar patterns.

A6.1 An Array of Point Sources

Consider an evenly spaced, linear ...