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 ...

To me, this means a large parabolic reflector, a feed horn made of brass sheet, coat hanger wire, and at least for the initial experiments, an RTL-SDR dongle. I’ve done the calculations ...

Parabolic reflectors and ellipsoidal reflectors are used to maximize illumination or projection system output by increasing light source efficiency. These devices resemble small satellite dishes in ...

Description: disorienting or signaling your location; runs 5.5 hoursDeep-dish parabolic reflector produces a concentrated beam with optimum peripheral illuminationC4 LED technology, impervious to ...

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 in a concentrated beam.