Ambient Noise Levels
The Apple Watch also has ambient noise level detection. As long as you have watchOS 6, your wearable will now analyze the noise level in your environment — and can even warn you if that level rises to above 90 decibels.
Any noise above 90 decibels is, according to the World Health Organization, dangerous to your hearing. That means the Apple Watch can now look out for your aural health — whether you work on a construction job site or you just frequent loud concerts and festivals. And don’t worry: watchOS won’t record or save any audio.