Patents Assigned to Yotsumoto Acoustic Design Inc.
  • Sound absorbing structure
    Patent number: 6568135
    Abstract: A sound absorbing structure including a sound absorbing member, an air layer, and a resonant sound absorbing structure. The air layer is formed in the rear of the sound absorbing member. The resonant sound absorbing structure includes a slit and is formed in the rear of the sound absorbing member. The sound absorbing member is a surface plate covering the rear air layer and the resonant sound absorbing structure, and the sound absorbing member is shaped in one of a plate and plane.
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: May 27, 2003
    Assignees: Nichias Corporation, Alumu Corporation, Yotsumoto Acoustic Design Inc.
    Inventors: Yoshiaki Yokoyama, Shinji Migita, Shinichi Okuzono, Kyoji Fujiwara, Takuya Fujimoto, Yukio Hattori