All synchronism belts driving are structure simple, noise lower, running steady and vibrate lower.

所有动力均采用同步带传动，结构简单，噪音低，运行平稳，振动小。

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SF (b) series adopt special twisted blade design and flange flanging casing, which makes the noise lower and the air volume larger.

本系列风机的叶片采用特殊扭曲孤度设计，机壳采用法兰翻边工艺，使风机噪音更低，风量更大等特点。

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The speed, efficiency, automation, precision and reliability for mechanical Products are required higher and higher while vibration and noise lower and lower, weight lighter at present.

当前，对机械产品高速、高效、精密、可靠、低振动、低噪声、轻量化和自动化的要求越来越高。

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Better aerodynamics (replacing side mirrors with digital lenses, for instance, to reduce drag and wind noise), lower-resistance tires, low-voltage engine accessories, lighter vehicle structures there's a lot on the agenda.

WSJ: Ford C-Max Hybrid Energi: The Bawdy Electric

Lower the noise and take advantage of fear in the market.

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"What we found was that the number of species we had at each location tended to be lower when noise levels were higher, " Dr Proppe observed.

BBC: Traffic noise driving songbirds to the limit in cities