What if as Kylo enters the First Order conference room, they are listening to the message; when he throws head on table it switches off immediately, the two stormtroopers could perhaps hear palpatines message from outside the room. (Basically could be muffled as Knights Of Ren and Kylo make they’re way over, stormtroopers make comment about it instead of ghouls)

Test: https://www.youtube.com/watch?v=OqgxZj4Medo

Someone else can probably do this a lot better, maybe a blue light could shut off to represent a hologram.