These spectrographs shows the signal going to the subwoofer and convey the same information as the waterfall plots. Blue is quiet and red is loud. Frequencies L-R as shown in the scale. Time is bottom (earliest) to top (most recent). Software used is Spectrum Laboratory and is freeware

Star Wars2

Ch3 - Ship explodes on landing pad - 107dB

Pearl Harbour

Ch22 - Bombing of Battleship Arizona - 105dB

LOTR-Two Towers

Ch41 - Blocks landing after Helms Deep wall blown - 104dB

LOTR - Return of the King

Ch28 - Block lands from catapult - 104dB

James Bond

Ch1 - Surf sequence - 100dB

James Bond

Ch4 - Hovercraft crashes into building - 106dB

Star Wars I

Ch3 - Ship attacked in hold and explodes - 104dB

Terminator3

Ch12 - Crane smash - 104dB

LOTR - Fellowship of the Ring

Ch29 - Troll first appears in Moria fight - 103dB

Earthquake

Ch8 - When quake begins- 96dB

Open Range

Opening Thunderclap

Open Range

Thunder ("big un's coming...")

Open Range

Gunfight