Kimitaka Tsutsumi

Title: Kimitaka Tsutsumi: Innovator in Sound Image Localization Technologies

Introduction

Kimitaka Tsutsumi is a prominent inventor based in Tokyo, Japan. With a remarkable portfolio of 28 patents, he has made substantial contributions to the fields of sound image localization and sound field generation. His innovations are aimed at enhancing audio experiences through sophisticated technologies.

Latest Patents

Among his latest patents are the "Sound Image Localization Device," "Sound Image Localization Method," and "Program." These inventions provide a sound image localization device that flexibly controls directivity with a short calculation time. The device employs a reflector to analyze and direct sound signals from a linear speaker array. It features an expansion coefficient calculation unit that analytically calculates coefficients through spherical harmonic function expansion. Additionally, there is a filter coefficient generation unit that converts these coefficients for each speaker. A speaker drive unit then generates drive signals for the speakers, enabling precise sound localization.

Another notable patent is the "Sound Field Generator," which includes a dual modulation system for ultrasonic waves. This system modulates an ultrasonic wave signal according to two different modulation techniques, allowing it to produce sound in a controlled manner. The apparatus includes a filter unit that modifies frequency characteristics to ensure the cancellation of overlapping sounds at designated control points outside the sound field.

Career Highlights

Kimitaka Tsutsumi has held significant roles at well-known companies such as NTT Docomo, Inc. and Nippon Telegraph and Telephone Corporation. Throughout his career, he has been dedicated to advancing audio technologies and has contributed significantly through his research and development endeavors.

Collaborations

Throughout his career, Kimitaka has collaborated with other esteemed professionals in the field, including Kei Kikuiri and Atsushi Yamaguchi. These collaborations have fostered innovation and contributed to the successful development of his patents.

Conclusion

Kimitaka Tsutsumi exemplifies the spirit of innovation in the realm of sound technology. His extensive patent portfolio and collaboration with leading companies and individuals demonstrate a commitment to pushing the boundaries of audio experiences, making significant strides in sound image localization and sound field generation.