1. A method for processing an acoustic signal, comprising the steps of: receiving by a respiration monitoring system an acoustic signal recording body sounds; detecting by the system first noisy portions of the signal based at least in part on cumulative energies in the signal; detecting by the system second noisy portions of the signal based at least part on peak energies in the signal; isolating by the system third noisy portions of the signal based at least in part on the first noisy portions and the second noisy portions; calculating by the system a respiration parameter estimate using the signal without resort to the third noisy portions; and outputting by the system information based at least in part on the respiration parameter estimate.