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单词 Open tube
释义

Open tube

原声例句
日常生活医学科普

M is for middle ear infection: DNS also predisposes to middle ear infection because Eustachian tube which is the only drainage source of middle ear, opens in nasopharynx and DNS can cause its obstruction and resulting in middle ear infections.

M 是中耳感染:DNS 患者更倾向于患中耳感染,咽鼓管是中耳唯一的引流源,在鼻咽部打开,DNS 可引起咽鼓管阻塞,导致中耳感染。

英语百科

Acoustic resonance

(重定向自Open tube)
 String resonance of a bass guitar A note with fundamental frequency of 110 Hz.  Computed with from sampled sound with https://sourceforge.net/projects/amoreaccuratefouriertransform/ .
The first three resonances in an open cylindrical tube. The horizontal axis is pressure.
The first three resonances in a one end open and other end closed cylindrical tube. The horizontal axis is pressure.

Acoustic resonance is a phenomenon that consists of a given acoustic system amplifying a sound whose frequency matches one of its own natural frequencies of vibration (its resonance frequencies).

The term "acoustic resonance" is sometimes used to narrow mechanical resonance to the frequency range of human hearing, but since acoustics is defined in general terms concerning vibrational waves in matter acoustic resonance can occur at frequencies outside the range of human hearing.

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