Parabolic microphone

Parabolic microphone

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Parabolic microphones are generally not used for standard recording applications because they tend to have poor low-frequency response as a side effect of their design. This is a direct result of the physical laws that govern sound waves.

Parabolas only focus waves with a wavelength much smaller than the diameter of the parabola. Since sound waves travel at 342 m/s through the air (speed of sound), obtaining hi-fidelity sound (down to 20 Hz, the lower limit of human hearing)would require a parabola with a diameter greater than 342 m/s / 20 Hz = 17 meters in diameter. Most parabolic microphones sacrifice low-end fidelity to get a more manageable size.

External links

* [http://headwize.com/projects/showfile.php?file=noise_prj.htm Do-it-yourself parabolic microphone site 1]
* [http://www.solorb.com/elect/misc/bige/ Do it-yourself parabolic microphone site 2]
* [http://www.bambooturtle.us/ParabolicMicrophone.html Dollar Store Parabolic Microphone]


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