hey guys, i'm working on a concept for university. i wonder what's the easiest and best way to measure certain vibration in a room. imagine a room full o people dancing. is there any affordable device i can put on the floor that sends data to my computer so i can read out vibration values or use vibration as data?
thank you for your help
I would guess that a microphone, as Pointy suggested, would work, but if you're on a near-zero budget, find an old speaker and bolt it face-down to the floor. Connect the wires to a 1/8" phono plug and plug it into the microphone-in jack on your sound card. Record the vibration data using Audacity. The floor's vibration will flex the speaker cone and generate small amounts of electricity, which the sound card input will see. If you put a foam-lined box over the top (actually back) of the speaker you'll minimize the effect of sound waves from the air on the speaker cone.