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Visible Polar Patterns for Electro-acoustic Devices

Match LED polar patterns to acoustic devices
  (+7)
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As an instructional aid, and / or for professional use, I propose to mount LED(s) on microphones and/or loudspeakers, where the visible polar pattern of the LED(s) match the polar sensitivity or dispersion pattern of the electroacoustic device.

For Instance, an omnidirectional mic would feature a frosted LED uniformally visible from any direction, while a cardioid mic would feature a directional LED matching the polar pattern of the mic. Similarly, figure-8 mics would show the polar lobes from each side, but none from the polar minima.

Loudspeakers would be similarly enhanced, and either could be equipped with frequency-selective lighting (red for low frequency omnidirectionality, through green, yellow, blue, etc., matching the frequency-dependent polar response of the transducer.)

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csea, Nov 18 2013

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       A scanning laser would be better.   

       [+]
8th of 7, Nov 18 2013
  

       This sounds like a very good idea.
MaxwellBuchanan, Nov 18 2013
  

       Hang on a sec. Wouldn't all those LEDs block the sound?
MaxwellBuchanan, Nov 18 2013
  

       // Wouldn't all those LEDs block the sound? //   

       Two words: "One Direction"
8th of 7, Nov 18 2013
  

       As long as the LEDs are small compared to the wavelength of the highest frequency of interest (20kHz, ~1.7cm) there should be no significant blocking.
csea, Nov 18 2013
  
      
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