Development of Noise Measuring InstrumentSHEN Qiu-xia, YAO Qing, LAI Feng-xiang, ZHANG Zhi-tao 1. College of Informatics and Electronics, Zhejiang Sci-Tech University, Hangzhou 310018, China; 2. China National Rice Research Institute, Hangzhou 310016, ChinaAbstract:Noise measuring instrument is developed from the general sound level meter to real-time analysis instrument. Firstly, basic and precision sound level meters＇ products and functions are analyzed. Then, the common real-time analyzer products at home and abroad are introduced. Finally, the internal and external noise measuring instrument trend of development is discussed.[著者文摘]