Comment: Regardless of Jennings' timeline, his report of explosion...

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Regardless of Jennings' timeline, his report of explosion...

...was corroborated by Hess.

As for the sound analysis, it did not ~discover~ the explosions at the time of collapse. It corroborated the numerous reports of them and also shows that they started just before collapse.

So no, the sound wasn't just the weight of the building falling or snapping bolts.

...or auto tires and batteries.