Occasionally you can hear zulip emitting a sound of a device being put/closed. Since the noise is so short-lived I never had a chance to look at the exact source of the sound…
yet it seems a lot like transmitting arbitrary sounds like these is not intentional and could potentially lead to unexpected leak of PI.
Unless, of course, zulip is incapable of voice comms and that weird sound is just a notification sound of some sort?
I think Zulip uses Jitsi for voice comms/video chat and only if you click the button to start a call.
I don't think it picks up mics by default or anything like that.
I get a sound somewhat like waht you describe with every Zulip notification
I think it's just their notification sound
I don't think Zulip has voice