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by edejong
2660 days ago
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The article mentions using feno-like resonance to transform the frequency response (and phase). The effects of this are localized to a frequency-band around 440 Hz. Interestingly, this is a similar effect as mie-scattering. Therefore, I am not sure the common knowledge of bass-traps and heavy materials for muffling sounds are actually applicable here. I suggest reading the article and studying feno resonance. |
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My comment wasn't a comment to the test in the article, but the expectations of the article - that any sound can be blocked, the writer is implying that this can be built into anything "a quieter world", which is not true for low frequencies which can't cancel itself out (without a very controlled environment like two subs of the same size in a cabinet, or an MRI machine) simply because it passes through objects and don't bounce.
I've seen noise cancellation concepts for the real world before, where a unit is placed on a window to cancel out outside noise by matching the vibrations of the sound.
In practice however, the sound waves are not predictable without a controlled environment, so it's just vaporware/concept [1].
[1] https://www.youtube.com/watch?v=Mv6sBuwzLhk