Tunnel Fan Flexible Duct Air Duct A2 Low Frequency Ventilation Silencer

Product DescriptionTarget Noise Frequency Range340-600HzOuter Dimension250mm×250mm×150mmInner Dimension125mm×125mm×150mmTotal Cross Section Area250mm×250mmAir Channel Cross Section Area 125mm×125mmDetailed Photos Installation InstructionsThe application scenarios and installation of our products are much the same as the present silencers in the market. The only differences are that our products are far more efficient and take up much less space. They can be installed in ducts and other locations where noise insulation and air flow are both required. Stacking the same model of units will increase the noise attenuation proportionally, while stacking units of different models with different noise attenuation frequency bands will broaden the overall noise attenuation.Our AdvantagesThe noise attenuation power of our products is much higher than competitors, especially in the frequency range below 500 Hz. We can design and tailor-make products for specific frequency bands and air flow demands. Being meta-materials, a wide range of constituent materials can be selected for our products to meet stringent environments, such as high/low temperatures, high humidity, corrosive surrounding, fire safety requirements, etc.  FAQQ. Do you provide custom-made products?A. Yes, we provide design solutions and products to meet the specific needs of our customers.Q. Why can't I find similar products elsewhere?A. Our products are based on the proprietary locally resonant sonic metamaterials invented by our company founder, which is unique and well advanced and disruptive.Q. I do not have much knowledge about noise mitigation, and do not quite know what products to purchase.A. Contact us and tell us your noise problem. We will provide the solutions and the products./* March 10, 2023 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1