Company Filing History:
Years Active: 1999
Title: Innovations of Eric Andrew Wan
Introduction
Eric Andrew Wan is an accomplished inventor based in Hillsboro, Oregon. He has made significant contributions to the field of sound and vibration cancellation technology. With a total of two patents to his name, Wan's work showcases his expertise and innovative spirit.
Latest Patents
One of Wan's latest patents is a multi-actuator system for active sound and vibration cancellation. This system utilizes an LMS type algorithm featuring an adaptive filter. The unique aspect of this invention is that the error signal, rather than the input, is filtered through an adjoint filter of the error channel. This drives an adaptive filter that, for instance, operates a loudspeaker to create destructive interference for effective noise cancellation. The adjoint filter is achieved by reversing the flow direction of a standard filter, such as a finite impulse response filter, and swapping branching points with summing junctions and unit delays with unit advances. This innovation significantly reduces computational complexity for multiple-input-output systems.
Another notable patent by Wan is a method and system for generating an estimated clean speech signal from a noisy input. This method extracts time trajectories of short-term parameters from the noisy speech signal to obtain various frequency components, each with a magnitude and phase spectrum. The magnitude spectrum undergoes compression, filtering, and decompression to yield a modified magnitude spectrum. The final speech signal is reconstructed using the original phase spectrum alongside the modified magnitude spectrum.
Career Highlights
Eric Andrew Wan is affiliated with the Oregon Graduate Institute of Science & Technology, where he continues to advance his research and innovations. His work has garnered attention for its practical applications in improving sound quality and speech recognition technologies.
Collaborations
Wan has collaborated with notable colleagues in his field, including Hynek Hermansky and Carlos M Avendano. Their combined expertise has contributed to the development of cutting-edge technologies in sound processing.
Conclusion
Eric Andrew Wan's contributions to the field of sound and vibration cancellation demonstrate his innovative approach and dedication to advancing technology. His patents reflect a commitment to improving audio quality and speech clarity, making a significant impact in his area of expertise.