The air mass between the top and bottom plates can also oscillate at the strings' natural frequencies. 面板與背板之間的空氣也可以在琴弦的自然頻率下共振。
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. 其中利用改變不同的側向彈簧常數及軸向彈簧常數來(lái)推導系統的自然頻率表示式。
The natural frequency of specimen decreases as the crack length increases. 隨著(zhù)裂紋長(cháng)度的增加，試樣的固有頻率逐漸減小。
The swing is a pendulum with a single natural frequency depending on its length. 秋千是只有一個(gè)固有頻率的擺，此頻率決定于它的長(cháng)度。
