I mean they weren't on mute.

Actually that puts a funny idea in my head. Several pyramids away from Giza, the stepped pyramid, the bent pyramid and the ruined pyramid were all built by Sneferu, Khufu's father, and obviously only one or none of them could have been his tomb. What if he had some weird obsession that they had to be built in utter silence and gave up on one and made them start again if any of the men so much as grunted?