Location History:
- Fukuoka, JP (2012 - 2014)
- Kitakyushu, JP (2012 - 2014)
Company Filing History:
Years Active: 2012-2014
Title: Innovations of Atsuko Ryu
Introduction
Atsuko Ryu is a notable inventor based in Kitakyushu, Japan. She has made significant contributions to the field of audio technology, holding a total of five patents. Her work focuses on improving sound quality and noise control through innovative designs.
Latest Patents
One of her latest inventions is an active muffler that features improved response characteristics. This active muffler includes a speaker section with a diaphragm that generates sound, a voice coil for driving the diaphragm, and a distance sensor to detect diaphragm movement. The system utilizes an LED to reflect light off the diaphragm, which is then detected by a phototransistor to measure the distance to the diaphragm. Noise is captured by a microphone, and an opposite-phase signal is generated to counteract the noise. The system calculates the difference between the opposite-phase signal and the distance signal, allowing for precise feedback control to cancel out noise.
Another significant patent is a high-frequency signal interpolation apparatus. This device provides high-quality digital audio signals by interpolating high-frequency signals that may be missing due to compression. The apparatus includes a peak value detection and holding circuit that samples the digital audio signal to detect peak values. It generates a square wave signal and uses a high-pass filter to extract higher harmonic components, which are then added to the original digital audio signal to enhance its quality.
Career Highlights
Atsuko Ryu is affiliated with the Kyushu Institute of Technology, where she continues to innovate and develop new technologies. Her work has garnered attention for its practical applications in audio systems and noise reduction.
Collaborations
Atsuko collaborates with Yasushi Sato, a fellow researcher who contributes to her projects and innovations. Their partnership enhances the research and development process, leading to more effective solutions in their field.
Conclusion
Atsuko Ryu's contributions to audio technology through her patents demonstrate her innovative spirit and dedication to improving sound quality. Her work continues to influence the industry and inspire future advancements in audio technology.