while this is a narrow question, i thought the actual complexity of the answer, given the fact that it seems to be a bit of an abstract representation. would warrant a separate thread for this question.

the SNDINFO page appears to describe the rate of falloff as an inverse variation of some kind; the problem is, of course, that the actual effect on the distance is covered by general adjectives, such as "more quickly", "faster", and just "decreases"; is there a function relating to this?

also, could you express an algorithm, to a degree, in boolean algebra? the "abstract" nature trips me up...