Classroom Noise Monitor

Your device's microphone measures how loud the room is, right in the browser. When the class stays quiet the scene on screen grows and comes alive, and when it gets too loud the scene reacts so students can see it instantly.

No. The app only measures volume in real time. No audio is ever saved, stored, or sent anywhere, and students never need accounts.

The Free plan gives you 30-minute sessions and three themes, no account needed. Lifetime Pro is a one-time $20 payment that unlocks every theme, unlimited session time, and priority support. No subscriptions.

Any device with a microphone and a modern browser: a laptop, desktop, tablet, or the computer driving your interactive whiteboard. There is nothing to install. Just open the site, allow microphone access, and project the scene so the whole class can see it.

Pick a theme, press the start button, and allow microphone access when the browser asks. The app then listens to your room for a couple of seconds to learn its normal background level, so it adapts to your classroom automatically.

Every theme has nine milestones to earn in a single session: nine trees to grow, dinos to hatch, cars to park, rockets to launch. Set the challenge out loud before you press start: "let's complete the whole scene before the bell." Staying quiet becomes a game the class plays together, and a celebration banner appears when they make it.

Use the mic sensitivity slider during a session to fine-tune how strict the monitor is. Lower it for lively activities like group work, raise it for silent reading or test time. Your setting is remembered for next time.

The monitor knows three zones: quiet, a gentle working buzz, and too loud. Quiet makes the scene grow at full speed, a gentle buzz still makes progress but more slowly, and sustained loudness stops progress and warns the class on screen.

It depends on the theme. In most themes the scene starts to wilt or shrink if the room stays loud, which gives the class a reason to settle down quickly. Castle Builders, Train Journey, and Traffic Lights are gentler: noise only pauses progress there, and nothing already earned is ever lost.

Use the theme picker on the start screen. The Free plan includes Quiet Jungle, Dino Valley, and Traffic Lights, and Lifetime Pro unlocks all the rest.

You need a connection to load the page, but the sound analysis itself runs entirely on your device, so a slow connection will not affect how responsive the monitor feels.

Trees grow and the jungle comes alive while the class is quiet. If it gets too loud the trees stop growing, and if the noise keeps going they start to wilt. It is one of the three free themes and a great place to start.

Dinosaur eggs crack open and little dinos hatch out to play while the room is calm. Too much noise makes the volcano rumble, and if it stays loud the dinos hide back in their eggs. Dino Valley is also free.

A big traffic light mirrors the noise level: green while the class is quiet, yellow for a gentle working buzz, red when it gets too loud. Quiet keeps nine little cars cruising across town into the parking garage, and a red light jams the traffic until calm returns. Parked cars never roll back, and it is one of the three free themes.

Colorful playground balls bounce in the schoolyard while the class is calm, and a new ball joins for every stretch of quiet. Too much noise freezes the bouncing, and if it keeps up the balls slowly deflate until calm pumps them back up. Pro theme.

A pirate ship sails toward a palm island while the room is quiet, and a treasure pops into the open chest for every stretch of calm. Loud weather brews a storm that stops the ship, and sustained noise starts washing the treasure away. Pro theme.

Corals bloom and sea creatures come out to play when the class is quiet. When it gets loud the fish hide, and if the noise continues the coral starts to bleach. A nice fit for ocean or environment units. Pro theme.

A steam train rolls through the countryside, reaching a new station each time the class stays calm. Noise turns the signal red and stops the train, but it never rolls backwards, so every station reached stays reached. Pro theme.

The crew builds, fuels, and launches a rocket for every planet while the room is quiet. Noise puts the countdown on hold, and sustained noise triggers a red alert. Pro theme.

Mushroom houses sprout in the glade and their little windows light up while the class is calm. When it gets loud the wind picks up, and if it stays loud it blows the lights out. Pro theme.

Builders raise a castle stone by stone while the class works quietly. Noise makes the builders stop and the scaffolding shake, but built stone stays built, so progress is never undone. Pro theme.

A snowman gets built piece by piece and the northern lights begin to glow while the room is quiet. Too much noise stops the building, and if it keeps up a blizzard blows the snow away. Pro theme.

A hot air balloon floats higher and higher, past fields, mountains, and clouds, all the way to the stars, as long as the class stays calm. Noise stops the burner, and if it continues the balloon starts to sink. Pro theme.