Apple Watch Ultra User Guide
- Welcome
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- Apple Watch Ultra gestures
- Set up and pair your Apple Watch Ultra with iPhone
- Choose a function for the Action button on Apple Watch Ultra
- The Apple Watch app
- Charge Apple Watch Ultra
- Turn on and wake Apple Watch Ultra
- Lock or unlock Apple Watch Ultra
- Change language and orientation on Apple Watch Ultra
- Remove, change, and fasten Apple Watch bands
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- Apps on Apple Watch Ultra
- 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
- Set up Handwashing
- Connect Apple Watch Ultra to a Wi-Fi network
- Connect to Bluetooth headphones or speakers
- Hand off tasks from Apple Watch Ultra
- Unlock your Mac with Apple Watch Ultra
- Unlock your iPhone with Apple Watch Ultra
- Use Apple Watch Ultra without its paired iPhone
- Use your Apple Watch Ultra with a cellular network
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- Alarms
- Blood Oxygen
- Calculator
- Calendar
- Camera Remote
- Compass
- Contacts
- Depth
- ECG
- Medications
- Memoji
- News
- Now Playing
- Reminders
- 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 Ultra (U.S. only)
- Manage Apple Cash (U.S. only)
- Use Wallet for passes
- Use rewards cards
- Pay with Apple Watch Ultra on Mac
- Ride transit
- Use your driver’s license or state ID
- Use digital keys
- Use COVID-19 vaccination cards
- Weather
- World Clock
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- VoiceOver
- Set up Apple Watch Ultra using VoiceOver
- Apple Watch Ultra basics with VoiceOver
- Apple Watch Mirroring
- Control nearby devices
- AssistiveTouch
- Use a braille display
- Use a Bluetooth keyboard
- Zoom
- Tell time with haptic feedback
- Adjust text size and other visual settings
- Adjust motor skills settings
- Set up and use RTT
- Accessibility audio settings
- Use accessibility features with Siri
- The Accessibility Shortcut
- Copyright
Measure noise levels with Apple Watch Ultra
The Noise app 
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 Ultra doesn’t record or save any sounds to measure these levels.
Set up the Noise app
Open the Noise app
on your Apple Watch Ultra.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 Ultra.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 Ultra.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.