Scuba divers can use hand signals to communicate.

Learn how microphones work in the video and article below: "Microphones are a type of transducer - a device which converts energy from one form to another. Microphones convert acoustical energy (sound waves) into electrical energy (the audio signal)." 

Read full article here: How do Microphones Work?

A Florida Christian College upgrades...

Clear-Com’s Eclipse-PiCo digital matrix and Encore partyline intercom...

Did you know that the first sound recording of music...