1. A system for detection of a sound of interest amongst a plurality of dynamically varying sounds, the system comprising: a spectrum detector to identify a dominant 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 modified according to the dominant frequency includes a revised spectral positioning of the first mel filter bank ranging from the dominant frequency to a maximum frequency and the second mel filter bank ranging from a minimum frequency to the dominant frequency for detection of the dynamically varying sound of interest; a feature extractor, coupled with the modified mel filter bank, to extract a plurality of spectral characteristics of sound received from the modified filter bank; and a classifier to classify the plurality of spectral characteristics of the sound according to the dominant frequency to detect the sound of interest.