Does anyone know of philosophical work done on 'silence' as a speech act?

I don't mean the act of silencING someone else: I'm thinking about a conversational exchange where A speaks to B and B chooses to stay silent (though it would be natural to assume that B /should/ speak).

Something like a "performative silence," maybe?

Or (from a different perspective) the greatest possible flouting of Grice's maxim of quantity?

It seems like such actions are nonetheless communicative and, as such, could influence the conversational scoreboard.

My literature searches keep coming up with epistemic-injustice-type stuff which, though important, is just not what I'm looking for right now! (I don't think?!)

Anyway, help would be greatly appreciated!