An Efficient Method Applied to Pick-up Audio Signal from Strong Noise Environment

摘要：

The study, which focuses on an environment of strong noise source in the audio frequency, is how to pick-up the audio signal by using the traditional electronic technology. The process which deals with signals including noise and audio signals by using the circuit, such as impedance transforming circuit, logarithmic amplifier and active power filter, are used in improving SNR(signal-to-noise ratio). Finally, the effect which lows noise power and remain audio signals is obvious.

关键词： high-filter logarithmic amplifier noise environment signal-to-noise ratio

作者: FENG Changjiang

作者单位: Shijiazhuang Mechanical Engineering College, Shijiazhuang, 050003

会议类型: 国际会议

会议名称: 第七届国际测试技术研讨会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-05（万方平台首次上网日期，不代表论文的发表时间）