Sony LinkBuds S YY2950 Reference Manual page 84

When only one unit of the headset is worn, the Ambient Sound Mode is set to ON, even if the headset was set to the noise
canceling function when you used the headset last. Putting on both headset units will automatically turn on the noise canceling
function.
Note
The headset cannot fully perform the noise canceling function unless the supplied earbud tips are used.
If the headset is not worn properly in your ears, the noise canceling function may not work correctly. Twist the headset to put it
into your ears properly.
Related Topic
Wearing the headset
Turning on the headset
What is noise canceling?
Listening to ambient sound during music playback (Ambient Sound Mode)
What you can do with the "Sony | Headphones Connect" app
5-035-792-11(1) Copyright 2022 Sony Corporation
81