1. A system for detection of a sound of interest amongst a plurality of other dynamically varying sounds, the system comprising: a spectrum detector to identify a dominant spectrum energy frequency by detecting a dominant spectrum energy band present in a spectrum of sound energy of dynamically varying sounds; a first mel filter bank and a second mel filter bank that each comprises mel filters that filter a frequency band of the sound energy for detecting the sound of interest; a modified mel filter bank that includes a revised spectral positioning of the first mel filter bank and the second mel filter bank according to the identified dominant frequency for detection of the sound of interest; a feature extractor, coupled with the modified mel filter bank, to extract a plurality of spectral characteristics of the sound received from the modified filter bank; and a classifier to classify the extracted spectral characteristics of the sound according to the identified dominant frequency to detect the sound of interest.