室内噪声来源于室外噪声辐射和室内声源。
Indoor noise comes from the emission of outdoor noise and indoor sources of noise.
而室外噪声以交通噪声为主，其中摩托车噪声是学生最不愿意听到的。
While the exterior noise is mainly from the traffic, of which motorcycle noise is the most antipathic noise to students.
采用试验研究的方法，研究了某型空调器室外机组防护网对气动噪声的影响。
The effect of protecting mesh of air conditioner outdoor unit on aerodynamic noise is studied with experimental method.
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