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車子在行駛的時候，難免會有噪音，噪音的來源是很多的，種類同樣有很多，特別是發(fā)動機的噪音，大家可以通過做汽車音響改裝來給車子降低噪音，享受更好的汽車音樂。汽車噪音從種類上區(qū)分主要分以下三種：
一、高頻噪音，主要包括發(fā)動機咆哮聲、砂石敲擊底盤聲音、車體部件結(jié)構(gòu)不緊產(chǎn)生的震動聲。高頻聲音的特點就是清脆、響亮、易察覺，可以做發(fā)動機、引擎蓋、U型槽隔音，如果風燥很大，還會考慮做底板隔音等，做汽車隔音，主要還是根據(jù)車子具體的部位來做。
High-frequency noise, including engine roar, gravel percussion sounds chassis, body parts structure does not bear the sound vibrations produced. High frequency sound is characterized by crisp,loud, and easy to detect, you can do an engine, hood, U-slot insulation, if the wind dry large, soundproof floor will consider doing so do car noise, mainly based on the specific parts of the car to do.　
二、低頻聲音，這個主要包括路噪、胎噪、顛簸時減震的聲音、怠速時排氣管的氣浪沖擊。低頻聲音的特點是沉悶、不清晰，有時候，我們被低頻噪音搞得頭痛，還找不到原因。
Low-frequency sounds, this includes road noise, tire noise, bumps shock when the sound of the exhaust pipe at idle blast impact. Is characterized by low frequency sounds boring, is not clear,sometimes we do a headache is the low-frequency noise, also can not find the cause.
三、混合噪音，主要是來自車外的環(huán)境噪音。
噪音的傳導(dǎo)媒介其實很簡單，噪音的傳導(dǎo)就靠傳導(dǎo)媒介，汽車噪音的傳導(dǎo)媒介就兩種：一是金屬車體；二是空氣。
Conducting media noise is actually very simple, noise conduction rely on conduction medium, vehicle noise conduction media on two: First, the metal body; two air.
　　

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