A light rigid structure (of aluminum or other material) which reflects sound to a focus at which a MICROPHONE is placed. This focussing effect is very strong with WAVELENGTHs less than the aperture of ...

Parabolic reflectors are pretty handy devices ... be optimized enough to produce astronomy-grade mirrors for visible light, but it still has a lot of potential applications.

Parabolic reflectors for solar applications are nice stuff, and making your own is a great project in itself. One of the easiest ways we have seen is that of [GREENPOWERSCIENCE], who uses nothing ...

Parabolic space heaters are a type of infrared heater that use a parabolic reflector to aim the heat ... energy past the red ...