Combining the cepstrum method could identify the characteristic frequency availably. 結合倒頻譜方法可以有效地識別故障特徵頻率。
In a similar way,radiant energy has a characteristic frequency and length associated with it. 同樣，輻射能有其特性頻率和相應的波長。
Without changing the period size, the frequency bandgap is varied when the length of the stretching strip is adjusted. 在不改變周期的情況下，通過調整伸長窄帶長度可以改變帶隙特性頻率。
The natural frequency of specimen decreases as the crack length increases. 隨著裂紋長度的增加，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. 鞦韆是只有一個固有頻率的擺，此頻率決定於它的長度。
