他感到地板在轻微震动。
考虑到落地桶鼓是在标准垂直方向上：如用木地板，当鼓手击鼓，下面的鼓皮也要跟随着震动。
Consider a floor Tom mounted in a standard vertical orientation: With a hardwood floor, when the player hits the drum the bottom head vibrates sympathetically.
木制的舞蹈地板被设计成像是震动吸收者。
Wooden dance floors are designed to act like shock absorbers.
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