内噪声 meaning in English

internal noise

Acoustics - measurement of noise inside motor vehicles
声学汽车车内噪声测量方法
Railway rolling stock - test methods inside noise
铁路车辆.车内噪声的试验方法
Active control of propeller induced aircraft cabin noise
螺桨飞机舱内噪声的主动控制
Method of measurement of noise inside motor vehicles
汽车内噪声的测量方法
Effect of air - conditioning duct design on cabin inside noise
汽车空调风道设计对车内噪声的影响

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