iCloud: Play a sound on your device
If you think your lost iOS device or Mac is nearby, you can play a sound on it to help you find it.
Play a sound
If you’re already signed in to a different application on icloud.com, click the iCloud button to switch applications.
Click Devices, then select the device on which you want to play a sound.
In the device’s Info window, click Play Sound.
After the sound plays, a confirmation email is sent to your Apple ID email address (the one you use with iCloud).