تويتر \ Topmarks على تويتر: "New blog post: Bouncy Balls is a free noise level meter to monitor and manage classroom noise or visualise music in a fun way. Full details here:
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!!
![Free Technology for Teachers: Two Browser-based Noise Meters That Show Students How Loudly They Speak Free Technology for Teachers: Two Browser-based Noise Meters That Show Students How Loudly They Speak](https://4.bp.blogspot.com/-y9zGqZtEBFU/U0gWM4VzY0I/AAAAAAAAlr8/qmCr8UOO1GY/s1600/bouncy.png)