Apple Watch User Guide
- Welcome
- Your Apple Watch
- What’s new
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- Get started
- Apple Watch gestures
- Set up and pair your Apple Watch with iPhone
- The Apple Watch app
- Charge Apple Watch
- Turn on and wake Apple Watch
- Lock or unlock Apple Watch
- Change language and orientation on Apple Watch
- Remove, change, and fasten Apple Watch bands
- Stay fit with Apple Watch
- Track important health information with Apple Watch
- Stay connected with Apple Watch
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- Apps on Apple Watch
- Open apps
- Organize apps
- Get more apps
- Tell time
- Status icons
- Control Center
- Use Focus
- Adjust brightness, text size, sounds, and haptics
- See and respond to notifications
- Change notification settings
- Manage your Apple ID
- Use shortcuts
- Create an emergency Medical ID
- Manage fall detection
- Set up Handwashing
- Connect Apple Watch to a Wi-Fi network
- Connect to Bluetooth headphones or speakers
- Hand off tasks from Apple Watch
- Unlock your Mac with Apple Watch
- Unlock iPhone with Apple Watch
- Use Apple Watch without its paired iPhone
- Use your Apple Watch with a cellular network
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- All about Apple Fitness+
- Subscribe to Apple Fitness+
- Set up Apple Fitness+ on Apple TV
- Browse Fitness+ workouts and Meditations
- Start a Fitness+ workout
- Pause and resume a Fitness+ workout
- End and review a Fitness+ workout
- Work out together using SharePlay
- Change what’s on the screen during a Fitness+ workout
- Download a Fitness+ workout
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- Alarms
- Blood Oxygen
- Calculator
- Calendar
- Camera Remote
- Compass
- Contacts
- Cycle Tracking
- ECG
- Heart Rate
- Memoji
- News
- Now Playing
- Reminders
- Sleep
- Stocks
- Stopwatch
- Timers
- Tips
- Voice Memos
- Walkie-Talkie
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- About Wallet
- Apple Pay
- Set up Apple Pay
- Make purchases
- Send, receive, and request money with Apple Watch (U.S. only)
- Manage Apple Cash (U.S. only)
- Use Wallet for passes
- Use rewards cards
- Pay with Apple Watch on Mac
- Ride transit
- Use your driver’s license or state ID
- Use digital keys
- Use COVID-19 vaccination cards
- Weather
- World Clock
- Copyright
Measure noise levels with Apple Watch
The Noise app 
on Apple Watch SE and Apple Watch Series 4 and later measures the ambient sound levels in your environment using the microphone and duration of exposure. When Apple Watch detects that the decibel level has risen to a point where hearing could be affected, it can notify you with a tap on the wrist.
Note: The Noise app uses the microphone to sample and measure the sound levels in your environment. Your Apple Watch doesn’t record or save any sounds to measure these levels.
Set up the Noise app
Open the Noise app
on your Apple Watch.Tap Enable to turn on monitoring.
To measure the environmental noise around you in the future, open the Noise app or use the Noise complication.
Get noise notifications
Open the Settings app
on your Apple Watch.Go to Noise > Noise Notifications, then choose a setting.
You can also open the Apple Watch app on your iPhone, tap My Watch, then go to Noise > Noise Threshold.
Turn off noise measuring
Open the Settings app
on your Apple Watch.Go to Noise > Environmental Sound Measurements, then turn off Measure Sounds.
You can also open the Apple Watch app on your iPhone, tap My Watch, tap Noise, then turn off Environmental Sound Measurements.
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