You don't need to know the exact value in decibels or the exact frequency in hertz in order to use TrikTraks. All you need to do is to feed TrikTraks numbers, and it will create the frequencies, changes, etc.
The best way to play with TrikTraks is to put in arbitrary numbers, and hear what happens.
When you get to a point where you might want to make a composition with TrikTraks, then it can be helpful to know exactly what is going on in terms of hertz and decibels.