Authors:

Shaocheng Wu

Date Created:

Not specified

Course Title:

Professor:

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About Paper:

Pile-driving noise poses significant risks to marine life. However, current noise mitigation systems (NMS) typically struggle to attenuate low- frequency noise effectively, are hard to deploy on a large scale, and are expensive and hard to operate. To address the limitation in NMS, we proposed a Underwater Acoustic Metamaterial that has standout properties, including being foldable and having superior low-frequency noise reduction, and is easy to manufacture. In this research, we developed a foldable waveguide array utilizing air- entrained plates to build soft boundaries that efficiently block low- frequency sound transmission. Additionally, Air-entrained plates were manufactured with a 3D-printed flexible resin, and an array of waveguides was constructed using them as well. Furthermore, Both COMSOL simulations and underwater experiments were verified. The simulation results indicated an average of 35 dB, with a peak noise reduction of 120 dB. The experiment results showed an average insertion loss of 30 dB, with a maximum reduction of 60 dB over several octave bands. Finally, Future research will investigate scalability and adaptability to deployment in large underwater environments. Keywords: Acoustic Metamaterials; Noise Control; Underwater Acoustics

Source:

Purdue University / 2025

Topics:

No topics listed

Co-authors:

Shaocheng Wu