[chrismorgan]

What does it mean to “cancel” or “block” “94% of sound”? From the paper’s abstract: “Finally, the proposed unit-cell performance is validated experimentally, demonstrating a reduction in the transmitted acoustic energy of up to 94%.”

Does this basically mean amplification by about −12 dB?

[tszyn]

I guess so, but when you use energy instead of pressure, and a linear scale rather than logarithmic, it makes the results look more impressive.