全新的动力装置以齿轮传动结构为特点，此结构允许前端风扇转速比中心部分慢3倍，优化了发动机各部分的速度。
The all-new powerplant features a geared architecture allowing the front fan to spin three times slower than the core, thus optimising the speed of each section of the engine.
文中还比较了用发动机转速慢加速扫描的动态方法及稳态转速下测得的噪声值。
The noise values measured by using gradual acceleration scanning and steady engine speed methods are also compared in this paper.
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