RoomTone
Free, private, projector-ready

A Classroom Noise Monitor Students Want to Watch

Turn room volume into live reactions and calm-time challenges. No account, no recordings, and ready in one click.

Open monitor See the traffic-light guide
Live classroom tool

Choose a scene, set the activity, then press Start.

Live ReactionDon’t wake MisoSleepy cat
Live reactionChoose a world and start
Open-ended classroom modeMiso follows the room with no timer or finish line.
Live reactionPress Start to listenOFFMIC
Current gameSleepy catLive Reaction
Voice target
How this mode worksNo timer. No finish line.

Reacts instantly to classroom noise and recovers one step at a time.

Audio stays on this device. Nothing is recorded.

Seven classroom worlds

Choose a game

Pick an open-ended reaction or a calm-time challenge. Every game uses the same voice targets and keeps audio on this device.

Live reactions

Open-ended scenes that follow the room with no timer or finish line.

Goal challenges

Calm time moves the class toward milestones and a shared finish.

Set the finish time

How long should the class stay calm?

Choose the calm time needed to reach the finish. Working voices move more slowly, and loud sound pauses the challenge.

Use a whole number from 1 to 180, such as 45.

Sleepy cat5 min to finish

Tune this room

Teacher settings

Device-relative readingThis is not calibrated dB SPL. Set the target while the room sounds right.

Nothing recordedAudio stays on this device.

Made for the boardLarge cues stay clear across the room.

No student profilesNo names, accounts, or noise history.

Two clear ways to play

Choose a reaction or a goal.

Use an open-ended scene for continuous feedback, or give the class a shared destination to reach together.

  1. Pick the feedback

    Live Reaction follows the room. Goal Challenge adds milestones and a finish.

  2. Set the voice target

    Silent work, partner talk, and group work each begin with a practical threshold.

  3. Let the scene cue the class

    Characters react, slow, pause, and recover before you need to interrupt.

Two game types, seven worlds

Pick the feedback your class needs.

Two worlds react live. Five more turn calm time into a goal the class can finish.

Sleepy cat

Keep Miso dreaming

Miso moves from deep sleep to an alert hiss, then settles in stages.

How to use Sleepy cat
Paper flight

Guide the plane home

Build calm time to pass six waypoints and make the delivery.

How to use Paper flight
Star watch

Complete a constellation

Reveal eight stars and connect the full shape in the night sky.

How to use Star watch
Quiet garden

Grow from seed to bloom

Unlock roots, a sprout, leaves, a bud, a flower, and a pollinator.

How to use Quiet garden
Mural maker

Color one shared mural

Fill nine connected panels without losing any color already earned.

Try Mural maker
Marble mission

Roll through every checkpoint

Keep one bright marble moving along a continuous geometric route.

Try Marble mission
Lantern glow

Keep the whole scene glowing

Seven lanterns glow, soften, and relight as the room changes.

Try Lantern glow
Clear cues, honest measurement

A traffic light for the room, not a laboratory meter.

Laptop microphones hear rooms differently. RoomTone uses a device-relative level, so start with a preset while the activity sounds right and adjust only if needed.

How to use the traffic lightChoose classroom noise levelsAll teacher guides

QuietCalm state or full progress

!WorkingLive reaction or slower progress

×Too loudStrong reaction or paused goal

Privacy by design

The microphone is a meter. Nothing more.

RoomTone reads short waveform samples in the browser, calculates relative loudness, and discards them immediately.

Read the privacy explanation
Teacher library

Guides you can use with the monitor off.

Setup, science, activity recipes, and comparisons so the site remains useful even when the monitor is off.

Teacher FAQ

Recording, decibels, browsers, alarms, cookies, and projector setup.

Teacher questions

Before you put it on the board.

Is this classroom noise monitor free?

Yes. All seven noise games, activity presets, teacher settings, and fullscreen mode are free and require no account.

Does RoomTone record students or classroom conversations?

No. Your browser reads moment-to-moment microphone volume locally. RoomTone does not create recordings, recognize speech, upload audio, or store microphone samples.

How do the classroom noise games work?

Sleepy Cat and Lantern Glow are open-ended Live Reactions. Paper Flight, Star Watch, Quiet Garden, Mural Maker, and Marble Mission are Goal Challenges that build progress during quiet and working sound.

Is the number a real decibel reading?

It is a device-relative classroom level based on the microphone signal, not calibrated sound pressure level (dB SPL). Tune the preset and thresholds for the device and room.

Can I show it on a projector or classroom display?

Yes. Every game has a fullscreen mode with large characters, words, and shapes. Goal Challenges also show progress marks that remain readable across a classroom.

What happens when the classroom gets too loud?

Miso becomes alert and settles gradually after the room quiets. Goal Challenges slow at working volume and pause when the room is too loud. A local chime is optional and off by default.