To create the final based on this report, the following technical drawings should be included:
Unlike point sources which radiate a spherical wavefront (SPL decreases by 6dB per doubling of distance), an ideal infinite line source radiates a cylindrical wavefront (SPL decreases by 3dB per doubling of distance). In practice, a finite array approximates this behavior within the "Near Field" distance ($r$): $$r = \fracl^2 f2c$$ Where $l$ is the array length, $f$ is frequency, and $c$ is the speed of sound.
The following appendix provides additional information on the design of the 12-inch line array box:
To create the final based on this report, the following technical drawings should be included:
Unlike point sources which radiate a spherical wavefront (SPL decreases by 6dB per doubling of distance), an ideal infinite line source radiates a cylindrical wavefront (SPL decreases by 3dB per doubling of distance). In practice, a finite array approximates this behavior within the "Near Field" distance ($r$): $$r = \fracl^2 f2c$$ Where $l$ is the array length, $f$ is frequency, and $c$ is the speed of sound.
The following appendix provides additional information on the design of the 12-inch line array box: