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 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 more ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Jay Holben The next in line on our examination of lighting fixtures is the PAR, which is an ...