Abstract: A dynamic sound enhancement system and method which produces non-linear dynamic gain, time domain offset, and damping control in relation to frequency components of an applied audio signal. The functions and characteristics of the system make it feasible to extend the ability of small speakers to distinctly reproduce natural low frequencies including bass and sub-bass frequencies concurrently with high frequencies. Further, the system provides customization of system characteristics for obtaining optimized sound quality, audibility, and sound perception from diverse sound producing devices, and which satisfies diverse user hearing needs and listening preferences.

Abstract: A dynamic contoured-sound/subwoofer-synthesis system including an adjustable high pass filter coupled to the input terminal, the high pass filter being designed to provide a variety of frequency response shapes in response to adjustments thereof. A primary amplifier is coupled to receive one of the variety of frequency response shapes from the adjustable high pass filter and includes a main operational amplifier (op-amp) with the inverting input coupled to the adjustable high pass filter through a series connected input capacitor and input resistor. The primary amplifier provides low frequency signal gain and shaping of the received frequency response shape. A high frequency signal shaping circuit includes a feedback op-amp coupled to the inverting input of the main op-amp through a feedback resistor and a feedback capacitor.