Location History:
- Osaka, JP (2021)
- Suita, JP (2020 - 2022)
- Suita Osaka, JP (2022 - 2023)
Company Filing History:
7 out of 40 
6 out of 557 
3 out of 937 
Years Active: 2020-2023
Title: Innovations of Yoshinobu Kajikawa
Introduction
Yoshinobu Kajikawa is a prominent inventor based in Suita, Japan. He has made significant contributions to the field of active noise control systems, holding a total of nine patents. His work focuses on innovative solutions that enhance sound quality and reduce unwanted noise.
Latest Patents
Kajikawa's latest patents include an active noise control system that utilizes noise cancellation sounds. This system features adaptive operations involving a speaker that outputs noise cancellation sound and a microphone that detects an error signal. An auxiliary filter generates a correction signal from a noise signal to correct the error signal, compensating for the difference in position between the microphone and the noise cancellation position. The adaptive filter performs operations using the corrected error signal to generate noise cancellation sound from the noise signal. Additionally, a transfer function learned when the second noise control system is stopped is set in the auxiliary filter of the first system, while the transfer function learned when the first system is stopped is set in the auxiliary filter of the second system.
Another patent describes an active noise control system where a first system signal processing unit generates a correction signal for an error signal from a noise signal. The system includes a subtractor that subtracts the correction signal from the output of a microphone to obtain an error signal. An adaptive filter then generates a cancel sound output from a speaker. The system also detects the position of a user's ear, allowing for adjustments to the adaptive operation based on the user's movements.
Career Highlights
Throughout his career, Yoshinobu Kajikawa has worked with notable organizations, including Kansai University and Alps Alpine Co., Ltd. His experience in these institutions has contributed to his expertise in developing advanced noise control technologies.
Collaborations
Kajikawa has collaborated with talented individuals such as Ryosuke Tachi and Yuji Saito. These partnerships have fostered innovation and creativity in his projects.
Conclusion
Yoshinobu Kajikawa's contributions to active noise control systems demonstrate his commitment to innovation and excellence in the field. His patents reflect a deep understanding of sound technology and its applications, making him a significant figure in the realm of inventions.