Location History:
- Champagne, IL (US) (1976)
- Champaign, IL (US) (1976 - 1994)
Company Filing History:
1 out of 1,200 
12 out of 832,966 Years Active: 1976-1994
Title: Duane H Cooper: Innovator in Stereo Audio Processing
Introduction
Duane H Cooper is a notable inventor based in Champaign, Illinois, with a remarkable portfolio of 13 patents. His work primarily focuses on advancements in stereo audio processing systems, showcasing his dedication to improving audio technology.
Latest Patents
Among his latest innovations is the "Head Diffraction Compensated Stereo System with Loud Speaker Array." This stereo audio processing system enhances source imaging and simulates desired listening environment acoustics while allowing for listener movement. The system employs a synthetic or artificial head microphone pickup, which serves as an input for a cross-talk cancellation and naturalization compensation circuit. This circuit utilizes minimum phase filter circuits to adapt the head diffraction compensated signals for loudspeaker use. The design ensures head diffraction compensation, including cross-coupling, while limiting the cross-talk cancellation and diffraction compensation to frequencies below approximately ten kilohertz.
Another significant patent is the "Head Diffraction Compensated Stereo System," which shares similar features and objectives as the previous system. This innovation also aims to improve audio reproduction and listener experience through advanced processing techniques.
Career Highlights
Throughout his career, Duane H Cooper has contributed to various organizations, including the National Research Development Corporation. His work has significantly impacted the field of audio technology, leading to advancements that enhance the listening experience.
Collaborations
Duane has collaborated with notable individuals such as Jerald L Bauck and Toshihiko Takagi, further enriching his contributions to the field.
Conclusion
Duane H Cooper's innovative work in stereo audio processing has established him as a key figure in audio technology. His patents reflect a commitment to enhancing sound reproduction and listener experience, making significant strides in the industry.