System for enhancing an analog signal

A system for isolating an undesired portion of a detected signal in order to actively cancel said undesired portion from a desired portion of said detected signal, comprising:

• a signal processor having analog signal processing components which include:
• first and second parallel filtering means, receiving said detected signal, for removing signals outside of a desired frequency band, said desired portion being substantially within said band, and for generating first and second filtered signals, respectively;
• time delay means, connected to said second filtering means, for delaying said second filtered signal by a predetermined time delay to generate a time delayed signal;
• and
• summing means, connected to said first filtering means and said time delay means, for summing said first filtered signal and said time delayed signal;
• isolation means for receiving a signal from said signal processor for isolating said undesired portion;
• inversion means for inverting said isolated signal;
• and
• transducer means, connected to said inversion means, for generating a cancellation signal, said cancellation signal cancelling said undesired portion of said detected signal.