I'm working on my thesis and it is about an speech enhancement system to use proper noise reduction method/algorithm for different types of noise, i want to test and compare some filters/algorithms for different noise types added to speech and find the best filter/algorithm for each noise type(s) so the designed system would use the best algorithm when it detects the noise type. are there any methods to automatically detect noise type so a speech enhancement system switch the filter/algorithm? considering noise type would change during the speech? any advise on noise classes and proper filter for each class? thanks in advance.