testing for noise is not that big a deal. integrating noise tests are not that big a deal. i presume the reason airlines do not test is that some of the planes exceed osha limits (by a long way.) i realize aa is phasing out MD 80's because they are too noisy(believe that, and i'll tell you another one).

have you ever been in the last few rows of an md80?? i could not find any noise tests for md80's. airlines do not want to know how loud their planes are. osha will kill them.