Isutomu Hamabe

Title: Isutomu Hamabe: Innovator in Active Noise Reduction Technology

Introduction

Isutomu Hamabe is a notable inventor based in Yokosuka, Japan. He has made significant contributions to the field of noise reduction technology. His innovative work focuses on creating solutions that enhance the quality of sound environments.

Latest Patents

Hamabe holds a patent for an "Active Noise Reduction Apparatus." This apparatus is designed to actively reduce noises transmitted from a noise source into a designated space. It features residual noise sensors that detect residual noises within the space. A reference signal is generated based on the noise-generating conditions of the source. This reference signal, combined with the detected residual noises, drives control sound sources to minimize noise levels. The system includes a filter that adjusts according to the acoustic transfer characteristics between the control sound sources and the residual noise sensors. Additionally, an identification sound is produced to correspond to the background noise level and the spectral distribution of the transmitted noises. The coefficients of the filter are updated based on the acoustic transfer characteristics obtained from the identification sound and the residual noises.

Career Highlights

Isutomu Hamabe is currently employed at Nissan Motor Company Limited, where he applies his expertise in noise reduction technology. His work contributes to the development of quieter and more comfortable environments in vehicles.

Collaborations

Hamabe collaborates with esteemed colleagues, including Akio Kinoshita and Kazuhiro Doi. Their combined efforts enhance the innovation and effectiveness of the technologies they develop.

Conclusion

Isutomu Hamabe's contributions to active noise reduction technology exemplify his commitment to improving sound quality in various environments. His innovative patent and collaboration with talented colleagues highlight his role as a significant figure in the field.