Company Filing History:
Years Active: 1989-1996
Title: Innovations by Fred D. Waldhauer
Introduction
Fred D. Waldhauer is an accomplished inventor based in La Honda, California. He has made significant contributions to the field of audio technology, particularly in the development of advanced audio compressors used in hearing aids. With a total of 5 patents to his name, Waldhauer's work has had a meaningful impact on enhancing auditory experiences for users.
Latest Patents
Waldhauer's latest patents include a multiband programmable compression system. This innovative audio compressor is designed for use in hearing aids and features a programmable compression ratio. The preferred embodiment of this compressor includes a variable gain limiter that provides variable gain amplification of the input signal, influenced by a programmable control signal. Additionally, a feedforward circuit operates in parallel to the variable gain limiter, providing a fixed gain signal. The output from both the limiter and the feedforward circuit is combined at a summing node, which serves as the output. The gain curve of the compressor is defined by a sigmoid function, with a pivot point located midway between the upper and lower break points.
Another notable patent by Waldhauer is also focused on a multiband programmable compression system. This version is specifically tailored for hearing aid devices that utilize a bandsplit filter to divide an input audio signal into multiple frequency bands. Each frequency band is associated with a limiter that offers variable gain amplification based on the amplitude of the input signal and a programmable control signal. The feedforward mechanism in this design also provides a fixed gain signal, which is combined with the output of the limiter at a summing node, leading to a variable gain amplifier. The control circuitry allows for programming the limiter gain to cater to individual user needs, and the compressor maintains a variable compression ratio in the form of a sigmoid function.
Career Highlights
Fred D. Waldhauer is currently employed at Resound Corporation, where he continues to innovate in the field of audio technology. His work has been instrumental in advancing the capabilities of hearing aids, making them more effective for users with varying auditory needs.
Collaborations
Waldhauer has collaborated with notable professionals in his field, including Carlos A. Baez. Their joint efforts have contributed to the development of cutting-edge audio technologies.
Conclusion
Fred D. Waldhauer's contributions to audio technology, particularly in hearing aids