Independent work
Run a quiet round during reading, writing, or individual practice.
Live classroom challenge
Quiet challenge
Keep the room below the target line until the timer ends. Audio stays on this device.
5:00
0% quietNoise limit
Microphone is off
Free classroom noise monitor
Turn classroom volume into one visible, shared challenge
This classroom noise monitor converts the live microphone level into a visual meter. Teachers set the sensitivity, students see the target line, and sustained extra volume costs a heart. Brief sounds are tolerated, and no recording leaves the device.
Classroom ideas
When to use: classroom noise monitor
Group activities
Raise the threshold for partner talk and collaborative work.
Calm transitions
Help the class settle after recess or while changing stations.
How it works
From setup to result in three steps
No account or installation. Open the tool, choose the classroom settings, and keep control in this browser.
- 1
Allow the microphone
The browser reads volume only while the challenge is open.
- 2
Set time and sensitivity
Match the duration and target to the current activity.
- 3
Protect the hearts
Stay below the line until the challenge timer ends.
Teacher tips
Use the tool as a clear classroom signal while keeping the learning task at the center.
- Adjust sensitivity when the room is at the voice level you expect.
- Use the meter as a whole-room signal, not to blame one student.
- Stop the microphone when the activity finishes.
Questions and answers
Frequently asked questions
Does the noise monitor record audio?
No. It measures volume locally without saving or transmitting audio.
Why is microphone permission required?
The browser needs it to estimate the room sound level.
Can I change the noise limit?
Yes. Adjust sensitivity for silent, partner, or group work.
Will one clap remove a heart?
Usually not. Sound must remain over the limit before a penalty.
Can I pause the challenge?
Yes. Pause preserves the remaining time and current hearts.