一种低成本噪声计设计

Low Cost Design for Noise Meter

噪声污染是当今三大污染之一,所以环境噪声监测就显得十分重要。目前市场上的噪声计价格昂贵,因此设计了一种低成本的噪声计。它由噪声信号采集及放大、A计权网络、有效值及对数运算、调整及数据显示等模块构成,其中对A计权网络做了精心设计和优化。结果表明,该噪声计具有轻便、成本低及基准可调等特点,能满足一般民用要求。

Noise is one of the three major pollutions in nowadays, so that noise pollution surveillance appears important. The price of the noise mater is very high at present,a low cost noise meter has been designed,which is made up of noise signal acquisition and amplification circuit, weighting network, the operation circuit for effective value and logarithm and the adjustment and displaying module. The elaborate design and optimization has done for the weighting network,the result shows that the meter has characteristics of portable, low -cost and datum mark adjustable so on, which can meet the requirements for civil use.