Takuma Okamoto, a Research Manager at the Universal Communication Research Institute of the National Institute of Information and Communications Technology (NICT), is pioneering the practical application of “Multiple Sound Spot Synthesis Technology.” This innovative technology employs multiple loudspeakers to cancel unwanted sounds and deliver distinct audio to different areas, enabling simultaneous narration in multiple languages.
At the NICT in Kansai Science City, Okamoto and his team developed a device featuring 16 small loudspeakers arranged in a circle, capable of playing narration in four languages—Japanese, English, Korean, and Chinese—based on the listener’s position. This technology utilizes sound field control and speech synthesis to create targeted sound zones, akin to noise-canceling technology but designed for multiple audio outputs.
Source: (NICT)
Okamoto’s initial prototype, consisting of 64 loudspeakers in a linear configuration, faced challenges regarding installation and portability. To overcome these issues, he redesigned the system in a circular layout, which improved sound clarity and minimized audio leakage. This revised design was successfully demonstrated at the National Museum of Emerging Science and Innovation and caught the attention of prominent companies.
To advance the technology further, Okamoto participated in the A-STEP program in 2022, focusing on enhancing sound quality, volume, and portability. By June 2023, the second prototype offered simultaneous interpretation in four languages. A more compact third prototype, introduced in early 2024, increased the system’s practicality and versatility.
Looking ahead, Okamoto plans to incorporate wireless capabilities and boost the device’s volume, exploring applications such as personalized home audio, in-car communication systems, and emergency broadcasts. The technology is on permanent display at the NICT Headquarters, showcasing its potential for diverse applications. Okamoto sees significant opportunities for commercializing sound customization technologies and is committed to further advancements in this field.
This concise version emphasizes the essential developments and potential applications of Takuma Okamoto’s “Multiple Sound Spot Synthesis Technology,” focusing on the technology’s evolution and future prospects.
