None were anywhere near as loud as actual demo charges, and actual demo charges aren't nearly as loud nor as powerful as the ridiculous amount of explosives truthers propose - explosives so powerful they pulverize an acre of concrete and send tons of material flying hundreds of feet.
There is no evidence at all for explosives.
Tons of concrete was pulverized, and tons of material was sent flying hundreds of feet. This we can see on video and in still photos. This is fact.
It is also a fact that the collapse was not silent. It was indeed very loud. This can be heard in numerous videos and audio recordings.
It is also a fact that we don't hear any obvious pre-collapse detonations. But that is to be expected if it were a disguised CD. I don't find it far fetched to believe that a CD could be engineered to appear as a natural collapse.
For example:
Thermite pre-weakening eliminates pre-collapse detonations.
Frequent, numerous, and precisely timed explosions could then be used to create the illusions of a natural collapse. ie, one explosions begins before another ends thus creating a roar.

