acoustic matching layer
... acoustic malfunction,声失效 acoustic matching layer,声匹配层 acoustic(quantity)transducer,声（学量）传感器 ...
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每个晶体结构由相间的二氧化硅层和高分子聚合材料层组成，相同材料层之间的间距与声子的波长相匹配。
Each crystal structure consists of alternating layers of silicon dioxide and a polymer material, so that the spacing between similar layers matches the wavelength of phonons.
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