What did it sound like?

When God spoke the cosmos into being, what did it sound like?

The First Law of Thermodynamics notwithstanding, all that energy and matter (could they be one in the same at that point?) was newly created.

Well, in modern time and space, when something like that happens, for instance the detonation of an atomic bomb, we get a massive explosion that registers on the Richter scale.

You can imagine the affect such an explosion would have on the eardrums of passersby. You might hear them query, "What was that Big Bang?"