air horn

基本解釋

We use this air horn to give a signal in the event of emergency.
應急情況下，用這個氣喇叭發(fā)信號。
club.sol.com.cn
The fighting starts when a signal such as an air horn or whistle blows, and can last anywhere from a few minutes to a few hours.
儅用號角或口哨發(fā)出信號時，大戰(zhàn)就可以開始了，在任何位置都行，能持續(xù)幾分鍾到幾個小時。
Second most harmful to our ears was the air horn, which exposes our ears to damage inducing levels of 123.6 decibels. This was followed by the drum, which reached 122 decibels.
對我們的耳朵造成傷害排名第二的就是氣喇叭，它能發(fā)出123.6分貝的聲音，緊跟其後的就是桑巴鼓，達到122分貝。

The horn obviously is a brass instrument and what makes the sound is a vibrating column of air.
顯而易見的,圓號是個銅琯樂器,它通過震動空氣柱來發(fā)出聲音
耶魯公開課 - 聆聽音樂課程節(jié)選

Or how the horn honks automatically when filling the tires to tell when the air pressure is right.
FORBES: Test Drive: 2013 Nissan Altima
But once or twice in every song, he would put his horn to his lips, stand ramrod straight, and play sweet, fast notes that danced in the air.
FORBES: Jazz, Schizophrenia And Side Effects