Barrie : Règlement no 2006-140, art. 1(17) — Noise By-law

Logarithmic Mean Impulse Sound Level The “Logarithmic Mean Impulse Sound Level”, sometimes denoted LLM of N impulsive sounds, is ten times the logarithm to the base 10 of the arithmetic mean of ten to the power of one tenth the impulse sound level of each impulsive sound. Algebraically, it can be written as:

• dBAI /10 dBAI /10 dBAI /10 LLM = 10 log10 [ 1 (10 1 +10 2 …+10 N )] where, dBAI1, dBAl2, ….dBAIN, are the N impulse sound levels.