Make a microphone out of a matchbox and pencil leads. Listen to sounds and music from the other side of the house using this DIY microphone. Simple audio electronics project. You will also need a battery, some wires and clips, and a pair of headphones or a speaker. Fun and simple science experiment, and great to do with children.
DaveHax uses a pencil to poke holes through the length a matchbox, then splits that pencil (and a second) open to get to the graphite. He flattens the graphite and then sticks it through the matchbox holes.
Then, he puts a shorter piece of graphite across the flattened graphite sticks to create a diaphragm.
Using a bunch of wires, batteries and headphones, he gets the modded matchbox to produce a rough little sound.A microphone is a device which converts acoustical energy known as sound waves, into an electrical energy know as audio signal.