随着工业、交通事业的快速发展,噪声问题已成为一项严重的环境问题.在项目建设之前进行环境噪声的预测是十分重要且可行的.本文将通过使用作者编写的噪声预测软件,以贵广二回直流工程极2系统调试—宝安换流站噪声预测为例,建立噪声传播...随着工业、交通事业的快速发展,噪声问题已成为一项严重的环境问题.在项目建设之前进行环境噪声的预测是十分重要且可行的.本文将通过使用作者编写的噪声预测软件,以贵广二回直流工程极2系统调试—宝安换流站噪声预测为例,建立噪声传播模型,分别用倍频带声压级与A声级数据进行预测,并将预测值与现场实测值以及丹麦B&K噪声预测软件Predictor Type 7810的预测值进行对比,以比较两种预测方法的预测精度以及与国外噪声预测软件之间的预测误差,并在此基础上对预测原理进行适当的补充和修正.结果表明,两种预测方法的预测精度都是较高的,且用倍频带方法预测的精度要高于用A声级方法预测的精度.该预测作为"十一五"科技支撑计划"特高压输变电开发与示范"项目的子项目"±800kV直流系统可听噪声计算软件的开发"的一部分,对该项目的开展和实施具有较大的现实意义.展开更多
In real life, when a noise problem occurs, it is important to identify the cause and measure the noise of the source, since it may affect human beings or other constructions due to vibration generated from noise, so i...In real life, when a noise problem occurs, it is important to identify the cause and measure the noise of the source, since it may affect human beings or other constructions due to vibration generated from noise, so it is necessary to determine the noise related to a specific source like a machine in the presence of other sources which is a very important approach in noise control engineering. In this article a full experiment was executed to measure the sound pressure levels of various sources (stationary and non-stationary), in both an anechoic chamber and a non-ideal noisy environment. The sound pressure level was extracted for different sources and compared for both ideal and non-ideal environment. The results showed that acoustical free field of the space is the best field to do measurements to avoid reflection, on the other hand the difference between the source and the background should be more than 3 dB to get better results.展开更多
文摘随着工业、交通事业的快速发展,噪声问题已成为一项严重的环境问题.在项目建设之前进行环境噪声的预测是十分重要且可行的.本文将通过使用作者编写的噪声预测软件,以贵广二回直流工程极2系统调试—宝安换流站噪声预测为例,建立噪声传播模型,分别用倍频带声压级与A声级数据进行预测,并将预测值与现场实测值以及丹麦B&K噪声预测软件Predictor Type 7810的预测值进行对比,以比较两种预测方法的预测精度以及与国外噪声预测软件之间的预测误差,并在此基础上对预测原理进行适当的补充和修正.结果表明,两种预测方法的预测精度都是较高的,且用倍频带方法预测的精度要高于用A声级方法预测的精度.该预测作为"十一五"科技支撑计划"特高压输变电开发与示范"项目的子项目"±800kV直流系统可听噪声计算软件的开发"的一部分,对该项目的开展和实施具有较大的现实意义.
文摘In real life, when a noise problem occurs, it is important to identify the cause and measure the noise of the source, since it may affect human beings or other constructions due to vibration generated from noise, so it is necessary to determine the noise related to a specific source like a machine in the presence of other sources which is a very important approach in noise control engineering. In this article a full experiment was executed to measure the sound pressure levels of various sources (stationary and non-stationary), in both an anechoic chamber and a non-ideal noisy environment. The sound pressure level was extracted for different sources and compared for both ideal and non-ideal environment. The results showed that acoustical free field of the space is the best field to do measurements to avoid reflection, on the other hand the difference between the source and the background should be more than 3 dB to get better results.
