Explosions Design

feature author: Paul Halliday

The Explosions design has a couple of models that don’t seem to fit anywhere else: Crash and Explosive Decompression. The worksheet is presented in Figure 35. These models are fun to activate, especially when you can catch people off guard. You just have to be careful not to give anybody a heart attack.

The Crash model is really simple. It uses three players to play on front, rear, and sub-woofer speakers. There is a single input coming from the host: a crash indication usually generated by a flight model. When this model is activated, it really gets everybody’s attention.

The Explosive Decompression model is a little more complicated. A malfunction trigger at the host called Explosive Decompression activates the model. This input is tied to the enable pins of two players, one for the rear speakers, and one for the sub-woofer. The frequency and balance pins are hard-coded constants.

The volume for the players is a function of an input called Differential Pressure. This input goes through the LFI shown in Figure 34. The higher the differential pressure, the louder the explosion.

Figure 34.  LFI for Differential Pressure on
 Explosive Decompression Volume

Figure 35.  Explosions Design