Company Filing History:
1 out of 85 
1 out of 2 
1 out of 832,880 Years Active: 2003-2008
Title: Tomonao Okubo: Innovator in Sound Insulation Technologies
Introduction
Tomonao Okubo is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of sound insulation and absorption technologies. With a total of two patents to his name, Okubo's work focuses on innovative solutions for controlling sound through advanced materials and structures.
Latest Patents
Okubo's latest patents include a sound insulation/absorption structure and an elastic wave control element using piezoelectric materials. The sound insulation/absorption structure is designed to insulate or absorb sound by controlling stiffness. It comprises a film member, such as a polymer film or metal foil, fixed to a frame body with at least one annular opening. The film member is shaped in a dome-like curvature, allowing it to resonate at frequencies equal to or higher than the audible frequency band. This design enables effective sound insulation or absorption through the elastic force of the film. The film member can also be replaced with various materials, including acrylic, polyethylene terephthalate, aluminum, or other molded plates.
The elastic wave control element utilizes piezoelectric materials to manage elastic waves in a selected frequency range. This element is integrated into a propagation path for elastic waves or an oscillator, allowing for damping, reflection, or transmission of the waves. The piezoelectric material is equipped with electrodes connected to a negative capacitance circuit, which helps match the loss factors of the circuit and the material for optimal performance.
Career Highlights
Throughout his career, Okubo has worked with reputable companies, including Rion Company Ltd. and the Kobayashi Institute of Physical Research. His experience in these organizations has contributed to his expertise in sound technology and innovation.
Collaborations
Okubo has collaborated with notable coworkers, including Hidekazu Kodama and Munehiro Date. Their joint efforts have further advanced the research and development of sound insulation technologies.
Conclusion
Tomonao Okubo is a distinguished inventor whose work in sound insulation and absorption has paved the way for innovative solutions in the field. His patents reflect a deep understanding of material science and acoustic engineering, making him a valuable contributor to the industry.