Achieve tunnel blasting without rattling or pressure! This is a soundproof material that reduces the generated ultra-low frequency noise. *NETIS registered product
The "TBI Resonator Type-F" is a soundproofing material that effectively eliminates prominent ultra-low frequency sounds such as 4Hz and 8Hz, which are generated by blasting, by utilizing the phenomenon of sound wave resonance. Ultra-low frequency sounds (sound waves below 20Hz) generated by tunnel blasting can cause complaints by rattling the fixtures of nearby houses and creating a sense of pressure on the human body. By combining the "TBI Resonator Type-F" with the "TBI Soundproof Door Type-F," we achieve tunnel blasting without rattling or pressure sensations. 【Features】 ■ Effectively eliminates prominent ultra-low frequency sounds such as 4Hz and 8Hz generated by blasting. ■ By combining with the "TBI Soundproof Door Type-F," we achieve tunnel blasting without rattling or pressure sensations. *For more details, please refer to the PDF document or feel free to contact us.
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basic information
"Sound Wave Suppression Using Resonance Phenomenon" ■ An acoustic tube with a length of 1/4 wavelength of the target frequency is placed in the tunnel. ■ The incident sound waves and the reflected sound waves in the acoustic tube interfere, reducing the sound pressure at the opening of the acoustic tube. ■ The acoustic radiation decreases due to the effect on the vibrating surface. *For more details, please refer to the PDF document or feel free to contact us.*
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Applications/Examples of results
【Application Examples】 ■ Applied to the Nagato Tawarayama Road Daineiji No. 3 Tunnel North Construction (Chugoku Regional Development Bureau) ■ Confirmed an increase in sound insulation at 4Hz, 6Hz, and 8Hz, which were targeted for noise reduction ■ It is possible to significantly reduce blast noise in combination with TBI soundproof doors *For more details, please refer to the PDF document or feel free to contact us.
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Company information
Fujisaki Shokai Co., Ltd. was established with the aim of selling screws and has since expanded from sales to manufacturing, delivering a variety of products necessary for civil engineering and construction. We promise custom products that meet customer demands for labor-saving, low cost, and assured precision. We aim to enhance our product lineup and become a company that can be of service to our customers.