secondary noise

We find that the long term performance of new shares are significantly lower than the stock index, and the higher the initial return is, the worse the long-term performance, which prove the existence of noise trading in the secondary market.

新股上市后一年间的市场表现显著低于大盘指数，并且IPO首日收益越高的股票，长期表现越差，从而证实了我们关于二级市场存在噪声因素的推断。

The control system of active noise attenuators in ducts. by processing the noise signal detected by the microphones, generates a signal exciting the secondary sound sources to radiate a sound wave cancelling the primary sound wave in the downstream.

管道有源降噪器的控制系统根据传声器检测到的噪声信号，经过加工处理，产生激励次级声源的信号，使其产生的声波在下游与原来的噪声相抵消。

The noise of hammering was dulled by the secondary glazing.

因为隔着双层玻璃，锤子的敲打声变低沉了。

Noise Mitigation of Jining Power Plant's Primary and Secondary Air Supply System and the Resulting Effect

济宁电厂一、二次风系统的噪声治理及效果分析

Environment friendly, healthy products, completely avoid the secondary pollution and great noise of conventional vacuum cleaners.

环保 、 健康型产品, 完全避免了拖走式吸尘器造成的有害的二次污染和很大的噪声.