Geek my class — Bouncyballs.org is a noise meter for your class....
Bouncy Balls (@bouncyballs_org) / Twitter
Signal S(t) from the microphone for a ball bouncing on the plate at... | Download Scientific Diagram
Teach Starter - How neat is this...monitor classroom noise level with virtual bouncy balls! It uses the microphone on your laptop, you can 'see' the noise level and so can your students!!
Bouncy Balls: A Good Tool for Managing Classroom Noise | Educational Technology and Mobile Learning
Monitor Classroom Noise with Bouncyballs.org - Classroom Freebies
Classroom Noise Monitor Apps That Teachers Will Love
Signal S(t) from the microphone for a ball bouncing on the plate at... | Download Scientific Diagram
HSD Water Bouncing Balls 55mm Children Adult Bouncing Floating Water Bouncy Ball Toy for Swimming HSD | Walmart Canada