... individual sources into equally annoying sound energy levels of a reference source and then sums these levels Fig illustrates this for two different sources (A and B) The level LB of source B is ... separate sources The sixth model is the annoyance equivalents model, which translates the noises from the individual sources into equally annoying sound energy levels of a reference source and ... combined sources, while L1, L2, , Ln are separate source LAeq values and f1(L1), , fn(Ln) are functions determined for each source This model is based on the assumption that the separate sources...