Research on Low-Frequency Noise Control Based on Fractal Coiled Acoustic Metamaterials

Figure 7

Overall coiled channel thermoviscous power consumption density distributions of each order metamaterial structure. (a) 214 Hz overall thermoviscous power consumption density distribution. (b) 400 Hz overall thermoviscous power consumption density distribution. (c) 119 Hz overall thermoviscous power consumption density distribution. (d) 200 Hz overall thermoviscous power consumption density distribution. (e) 69 Hz overall thermoviscous power consumption density distribution. (f) 150 Hz overall thermoviscous power consumption density distribution.

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