When someone beats a drum, it is the flexing of the membrane on the drum, first deflecting then rebounding, which causes the sound waves that we can hear.

当某人敲了一下鼓，是鼓面的伸缩，先压缩，然后反弹，由此制造了我们能听到的声波。

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For example, to model the sound of a drum, there would be a formula for how striking the drumhead injects energy into a two dimensional membrane.

举例来说，对于模拟鼓声，将有一个公式阐明敲击鼓面加添能量到二维的膜。

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It is you own Energy that will resonate with the Canvas of the drum and let the delicate membrane vibrate until a sound is heard Within.

与鼓共振的其实是你们自己的能量，就让那股微妙的能量之膜振动吧，就像鼓上帆布的振动一样，直到你们能听到内在的声音。

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