The air mass between the top and bottom plates can also oscillate at the strings' natural frequencies. 面板与背板之间的空气也可以在琴弦的自然频率下共振。
Appling the variety of different parameters of the lateral and axial spring constants, the expressions of the natural frequencies of the system will be derived. 其中利用改变不同的侧向弹簧常数及轴向弹簧常数来推导系统的自然频率表示式。
The natural frequency of specimen decreases as the crack length increases. 随着裂纹长度的增加，试样的固有频率逐渐减小。
The swing is a pendulum with a single natural frequency depending on its length. 秋千是只有一个固有频率的摆，此频率决定于它的长度。
