Protect concentration
Match a genuinely quiet room to all asleep so a sustained rise wakes the kittens.
Free teacher tool
Classroom Noise Meter
Quiet-time mission
Keep the kittens dreaming
Start this online noise meter for classroom activities, then use gentle voices to keep all three asleep.
- Open browser site settings (lock icon near the address bar).
- Set Microphone to Allow (or connect an external microphone if none is detected).
- Select Start monitor to try again.
Calm goal
Choose a reward goal
Start a goal from the teacher controls.
Private cue
Ready
Use this nearby screen as a quiet reminder for one student or a small group.
Teacher feedback
Did this help your classroom?
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No recordingNo audio files are created.
No accountOpen it and start the class.
Match the roomChoose how the kittens should look right now.
Smartboard readyLarge visual signal and full screen.
A calmer feedback loop
Built for what actually happens in a classroom
A classroom noise monitor should let students notice and lower their own volume without making the teacher repeat the same correction. Some reactive tools reward louder sound with more entertaining movement. These three kittens stay curled in one place; the number of awake kittens makes each sound stage readable without bouncing or spectacle.
Use the Cozy Kittens story when caring for sleepy animals helps younger learners understand the goal. Use Calm Signal for students who focus better with neutral feedback. Use Self-monitor on a nearby tablet when one student or small group needs a private, neutral cue. All views use the same local microphone analysis, four stable sound bands and one current-room starting point.
One-minute setup
Set the expected volume for this activity
- 1
Enable the microphone
Your browser asks for permission. The meter uses a physical microphone when it can and avoids common virtual inputs.
- 2
Try a normal classroom voice
Watch which kittens wake as the room moves through the four relative sound bands.
- 3
Match the current room
Choose how many kittens should be awake at the sound you hear now. That single example sets the starting point.
- 4
Put the signal on screen
Use full screen on a projector or smartboard so students can self-correct without interruption.
Before live monitoring
Set the expected voice level first
Choose, edit and project a free printable voice level chart PDF before the activity starts. The chart page also has a push-light setup, a 0-4 classroom volume reference and current-level practice for teachers who need a non-microphone cue. For a full activity plan, use the editable CHAMPS chart maker to show voice, help and participation expectations together.
When to use it
Different activities need different definitions of “quiet”
Use the homepage as a free online noise meter for classroom routines when you need a live monitor on a projector, smartboard, Chromebook or iPad. Use the printable voice chart when you need students to learn the 0-4 expectation before the room gets noisy.
Allow productive talk
Match normal partner voices to the kitten state you want before students begin.
Set one visible expectation
Open the page on the classroom computer, start the microphone, and show the same neutral signal without creating an account.
See the room level
The large state, text label and band meter provide visual information without depending on an audible warning.
Local by design
The microphone is measured, not recorded
The browser supplies a live audio stream so this page can calculate changing volume. The page does not use a recorder, create an audio file, transcribe speech, or send microphone samples to a server. Selecting Stop ends the tracks immediately.
Read the microphone and privacy details →Questions teachers ask
Classroom noise meter FAQ
Does this classroom noise meter record students?
No. It reads changing microphone amplitude inside the browser and does not create, retain or upload an audio recording. Press Stop microphone to release the stream.
How do I match the meter to my room?
Start the monitor and choose how many kittens should be awake at the current sound. That one example adjusts the hidden sensitivity while the four sound bands keep the same stable spacing.
Is the number a real decibel reading?
No. It is a relative classroom level. A browser and an uncalibrated laptop microphone cannot replace a certified sound-level meter for hearing-safety, workplace or regulatory measurements.
Do I need to understand the sound number?
No. The normal tool deliberately shows only the kitten state. Browser microphones cannot provide a trustworthy calibrated room-decibel reading, so the page does not present a technical number as if teachers need to interpret it.
Can one student use it privately?
Yes. Choose Self-monitor and place the tablet or laptop nearby. The page shows a private neutral cue for one student or small group, without a reward goal or public class language.
Does it have an alarm or traffic-light view?
It uses a silent visual alert instead of playing a disruptive alarm. Choose Cozy Kittens for a child-readable wake-up signal, select Calm Signal to show a green, amber and red classroom traffic light, or use Self-monitor for a private nearby cue.
Will it work on a smartboard, Chromebook or iPad?
It works in modern browsers that allow microphone access. School browser policies can block microphone permission, so a teacher or administrator may need to allow this site for the device.