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Sound Envelopes

Sound Envelopes

Sound Envelopes

(OP)
While the ideal loudspeaker emits a sphere of sound, many people picture the typical loudspeaker as emitting a cone of sound.  But, I am trying to model outdoor mass notification systems, such as tornado warning systems.  These look like a stack of pancakes on a pole and can emit 360 degrees in the horizontal plane* of the speakerstack...if not almost spherically around the speaker stack.  So, before I press the vendor for more details, any clue what the sound envelope might look like for such a design?

*I know, a plane has no thickness while the speaker-stack does.  But, the vendors claim 360-degree coverage...which may be emblished if they're trying to say constant dB-SPL at 360o.

Thanks in advance to all - for your thoughts on this.

RE: Sound Envelopes

In the horizontal plane I expect they are pretty much axissymmetric, in the vertical plane they will resemble the usual piston in a semi infinite baffle polar plot, which changes shape depending on the wavelength and the height of the array off the ground.

 

Cheers

Greg Locock

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RE: Sound Envelopes

You should have the manufacturer provide you with vertical and horizontal polar plots for these speakers.

Andrew Gorton, MSc
Noise & Vibration Consultant
www.PapadimosGroup.com

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