Sound input
Discover how to use the new micro:bit's built-in microphone to control your programs and measure sounds around you
The new micro:bit with sound has a built-in microphone sensor. It can react to loud and quiet sounds, and also measure how loud your environment is.
The microphone is on the back of the new micro:bit, and on the front you'll find a new microphone LED next to the hole that lets the sound in. It lights up to show you when your micro:bit is measuring sound levels.
These projects will get you started creating code using the microphone:
![](https://cdn.sanity.io/images/ajwvhvgo/production/00d4f459d9b75dd93da846288ae86520b6f34674-800x600.png?bg=fff&w=232&h=174&q=90&fit=min&auto=format)
Clap your hands to make the micro:bit heart beat
![](https://cdn.sanity.io/images/ajwvhvgo/production/1f64bcc8f5d5ea65d8ece3be53f254275aae3960-800x600.png?bg=fff&w=232&h=174&q=90&fit=min&auto=format)
Make lights flash to the rhythm
![](https://cdn.sanity.io/images/ajwvhvgo/production/56b7622be1eaa34fa0f1d9656c08a3ecae3022d3-1440x1080.png?bg=fff&w=232&h=174&q=90&fit=min&auto=format)
Test which materials are best sound insulators
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