What it does
This design uses 3D-printed acoustic metamaterials with tunable parameters to absorb low-frequency sound. Impedance tube tests validate performance and explore integration with materials like Rockwool for better noise control.
Your inspiration
The inspiration for this project came from the persistent challenge of controlling low-frequency noise from industrial machinery, such as water pumps and compressors. Traditional sound-absorbing materials like foam and fibreglass are ineffective at these low frequencies, often requiring large sizes. The idea emerged to use acoustic metamaterials, engineered to overcome these limitations. The integration of 3D printing technology allowed for precise design and fabrication of these materials with adjustable parameters, providing a more efficient, sustainable solution for noise control in industrial settings.
How it works
This design uses 3D-printed acoustic metamaterials, engineered to manipulate sound waves. The materials are created with adjustable parameters to tune them for absorbing specific frequencies, especially low-frequency noise common in industrial machinery. Using 3D printing, we can precisely control these parameters for optimal sound absorption. With ANSYS, the design is optimised for maximum absorption and minimal transmission loss. The printed materials are tested using an impedance tube to measure sound absorption and transmission loss. By analysing the sound absorption coefficient (SAC) and sound transmission loss (STL), we assess the material’s performance across frequencies. Additionally, integrating traditional materials like Rockwool enhances overall performance, combining low-frequency absorption with broader frequency control for an effective, sustainable noise reduction solution.
Design process
The design process began by tackling the challenge of low-frequency noise in industrial machinery, where traditional materials often fall short. The goal was to create 3D-printed acoustic metamaterials with adjustable parameters for optimal sound absorption in the 200-1600 Hz range. Using SolidWorks, 3D models were designed with key parameters. These models were optimised with ANSYS simulations to maximise sound absorption and minimise transmission loss. Prototypes were fabricated using FDM with PLA, selected for its eco-friendly properties and precision. The printed prototypes were then tested using impedance tube testing to measure their sound absorption coefficient (SAC) and sound transmission loss (STL). The test results informed adjustments to the designs. The prototypes went through multiple iterations, with changes to parameters for improving low-frequency absorption. Traditional materials like Rockwool were integrated to enhance performance and widen frequency control. The final design combined optimised 3D-printed metamaterials with Rockwool, providing a sustainable, effective solution for industrial noise reduction. This iterative design process, based on thorough testing and optimisation, led to a high-performance system suitable for industrial applications.
How it is different
This design is unique because it uses 3D-printed acoustic metamaterials, a solution not yet widely implemented for low-frequency noise control in industrial settings. Unlike traditional soundproofing materials, such as foam and fibreglass, which struggle to absorb low-frequency noise, this design leverages the innovative properties of acoustic metamaterials. By using 3D printing, the materials can be customised with adjustable parameters, allowing for precise tuning to specific frequencies, particularly in the challenging 200-1600 Hz range. The integration of traditional materials like Rockwool with 3D-printed metamaterials further enhances sound absorption across a broader frequency spectrum. This approach not only improves performance but also offers a sustainable, eco-friendly solution with PLA. The combination of 3D printing precision, customisable design, and material integration sets this design apart from existing solutions in industrial noise control.
Future plans
The next step for this design is refining and optimising 3D-printed metamaterials for scalable mass production, targeting industries with significant noise pollution issues, like automotive, construction, and HVAC. Business plans include partnerships with manufacturers to integrate these materials into cost-effective, sustainable noise control systems. Future developments aim to enhance performance even further, focusing on real-world testing and expanding design customisation. Ultimately, the goal is to revolutionise industrial noise reduction and position this solution as a leading, eco-friendly alternative in noise control technology.
Awards
Currently, this invention has not been nominated for or won any awards. However, it is a novel solution with strong potential for recognition in the fields of sustainability, industrial noise control, and 3D printing. We aim to enter future competitions and showcase its innovative approach to solving real-world challenges.
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