When the esses, (sibilant sounds), are too bright/cutting/aggressive I use pre fx volume automation to reduce it, (the wave form is very obvious and can be made more so in spectoral view). Sibilant sounds are very aggressive and result in a very dense, dark, small visual representation.
I suspect that raising that area may lift your ssss sounds IF there's enough of the actual sound recorded.
If you've lost bright esses without having treated the recording then there's something wrong along the chain. The worst set up for creating excessive sibilant sound is close to the microphone with a dry mouth.
What's your signal chain & how do you address the mic?

Last edited by rayc; 12/20/22 08:39 PM.

Cheers
rayc
"What's so funny about peace, love & understanding?" - N.Lowe