Location History:
- Hyogo, JP (2002 - 2004)
- Osaka, JP (2009 - 2017)
- Mie, JP (2017)
Company Filing History:
6 out of 118 
2 out of 13,281 
1 out of 16,453 
Years Active: 2002-2017
Title: The Innovations of Toshiyuki Funayama
Introduction
Toshiyuki Funayama is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of active noise reduction technology. With a total of 10 patents to his name, Funayama's work has had a considerable impact on various industries.
Latest Patents
Among his latest patents are an active noise reduction device, an instrument using the same technology, and an active noise reduction method. The active noise reduction device features a control block that determines the level of a reference signal detected by a level detection unit. If the control block determines that the level of the reference signal is small, it decreases the level of a cancel signal. This operation effectively suppresses the generation of abnormal sounds, even when the noise level is minimal. Additionally, the active noise reduction method utilizes a secondary noise source that generates secondary noise and an error signal source that outputs an error signal corresponding to the residual sound caused by interference between the secondary noise and the original noise. A μ-adjustment unit calculates a step-size parameter for updating a filter coefficient of an adaptive filter by multiplying a standard step-size parameter by a ratio of a standard representative input value to a representative input value corresponding to the amplitude of the signal.
Career Highlights
Throughout his career, Funayama has worked with notable companies such as Daiso Co., Ltd. and Panasonic Intellectual Property Management Co., Ltd. His experience in these organizations has allowed him to refine his skills and contribute to innovative projects.
Collaborations
Funayama has collaborated with several talented individuals, including Toyofumi Otaka and Shigeru Shoji. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.
Conclusion
Toshiyuki Funayama's contributions to active noise reduction technology exemplify his innovative spirit and dedication to improving sound quality. His patents and collaborations continue to influence the industry, showcasing the importance of his work in the field of inventions.