Spear Tip Education: Classroom noise Monitor - "Bouncy Balls"
Time to Talk Tech : Great way to visually show noise in your classroom (or home).
6 Best Classroom Noise Meters for Teachers | Educational Technology and Mobile Learning
Geek my class — Bouncyballs.org is a noise meter for your class....
bouncyballs org - YouTube
3 free classroom noise level monitors - Classcraft Blog - Resource hub for schools and districts
Bouncy Balls Noise Management Tool! - YouTube
Amazon.com: Waboba Lava Ball – Changes Colour in the Sun - UV Changes Yellow to Red – Bounces Sky High - Great Super High Bouncing Ball for the Whole Family : Toys & Games
Synchronization to a bouncing ball with a realistic motion trajectory | Scientific Reports
Free Technology for Teachers: Two Ways to Visually Show Classroom Noise - Best of 2016