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All toolsNoise MeterSound & Noise Tools
Not listening

This tool needs microphone access to measure classroom noise. Your audio is never recorded or sent anywhere.

Classroom tool
Free No sign-up Projector-ready

Free Classroom Noise Monitor

Show classroom noise levels live, set a visual alert threshold, and project the meter during quiet work or group activities.

How to use this in your class

  • •Set the threshold just above normal conversation level so students self-correct before it gets loud.
  • •Project the noise meter on the board during group work — so students can check their own volume.
  • •Use it during silent reading time with a very low threshold to reinforce quiet expectations.
  • •Pair the noise meter with a reward system: if the class stays green for 10 minutes, they earn a point.
  • •Introduce the tool on day one so students understand the visual cue before you rely on it.
Need several tools together? Open the whiteboard, timer, name picker, and wheel on one ClassBoard.Open

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How to set up your classroom noise monitor

  1. Select Start Listening and allow microphone access in your browser.
  2. Let students speak at the volume you want for the activity, then move Alert threshold just above that level.
  3. Use Open fullscreen and project the meter so the class can see the green, yellow, and red feedback.
  4. Select Stop when you finish to release the microphone.

Why use a classroom noise monitor?

A classroom noise monitor makes room volume visible during independent work, reading, and group activities. KiwiBee’s free online noise meter shows a relative sound level and a visual alert when it crosses your chosen threshold. Agree on a suitable level with your class, then project the meter so students can check it themselves.

How it works

The noise meter uses your device's microphone to estimate a relative ambient-sound level. A live gauge gives instant visual feedback. Set a threshold and the display changes color with a visible alert when the room crosses it. This is not a calibrated decibel meter; audio is processed locally and never recorded or sent anywhere.

Classroom noise meter vs. alternatives

Phone-based decibel apps give you a number, but students can't see it from across the room. Physical traffic lights require dedicated hardware and cost money. This browser-based noise meter is free, works on any device you can project, and lets you customize the threshold to match the activity — whisper-level for independent work, moderate for group collaboration.

Tips for effective use

  • Calibrate the threshold with your class — let them test what 'too loud' looks like on day one.
  • Position your laptop or device where the microphone can pick up the whole room, not just the front row.
  • Adjust the sensitivity for different activities: lower for tests, higher for collaborative projects.
  • Explain the visual alert before starting: agree on what students should do when the meter turns red.

Share to Google Classroom

Click the Google Classroom button to post the noise meter as a material in your class. This is especially useful for substitute teachers or co-teachers who want the same noise management tool without any setup.

Frequently Asked Questions

Is this a decibel meter?
No. It shows a relative classroom sound level, not calibrated decibels. Microphones and placement affect the reading, so set the alert threshold for your room and activity.
Why is the noise monitor not responding?
Select Start Listening and check that your browser allows microphone access for KiwiBee. Make sure your device has a working microphone, then speak nearby to check the meter. Adjust the threshold to suit the room.
Does the classroom noise meter record audio?
No. The microphone input is processed in real time in your browser to calculate volume levels. No audio is recorded, stored, or sent to any server.
Do I need to install anything?
No. The noise meter runs entirely in your browser. Just open the page, allow microphone access when prompted, and you're ready to go.
Can I adjust the sensitivity?
Yes. You can set a custom threshold level so the alert triggers at the volume that makes sense for your activity — low for quiet work, higher for group discussions.
Does it work with a projector or interactive whiteboard?
Yes. Project the browser tab onto your board and the meter appears on the shared screen. The microphone on your laptop picks up the room sound.
Will it work on my phone or tablet?
Yes. The noise meter is fully responsive. Some teachers place a tablet at the front of the room as a dedicated noise monitor.
Is the classroom noise meter free?
Yes. No ads, no paywall. It runs in your browser and works on any device with a microphone.

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