他发现，声音回声衰减的时间长短取决于周围物质对声音原始能量的吸收。

He found that the length of time it takes a sound's echo to decay is determined by the absorption of the sound's original energy by surrounding material.

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音频回声滤波器在一个给定延迟重复一个声音，衰减基于衰变率的重复。

The Audio Echo Filter repeats a sound after a given Delay, attenuating the repetitions based on the Decay Ratio.

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这些特征应该被记录：大小、形状、回声反射性、边界、方位和衰减（例如：减弱或增强）。

These features should be noted: size, shape, echogenicity, margin features, orientation, and attenuation (eg, shadowing or enhancement).

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这些特征应该被记录：大小、形状、回声反射性、边界、方位和衰减（例如：减弱或增强）。

These features should be noted: size, shape, echogenicity, margin features, orientation, and attenuation (eg, shadowing or enhancement).

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