Through the analysis of noise generation mechanisms and noise distribution of air blower,a sound isolation chamber with sound insulation and sound absorption functions was installed,which reduced the noise level to lower than 85 db from 98 db,meeting the industry standard.

It was analyzed the business functional requirements of Hohhot Railway Administration’s freight transportations integrated information services,introduced the design thinking,overall structure of Freight Transportation Integrated Information Service System,designed the system function from the telephone voice service,the short note service,the freight transportation marketing.

Introduction to develop multimedia telephone voice system with CTI technology and computer multimedia technological.

Multi-speaker segmentation and clustering of telephone speech;

Intelligence telephone speech solicit students system makes use of the current and prosperous telephone net, and follows with the advanced technique that is absorbed in aolvanced country, and adopts the calculator network technique, arithmetic figure signal to handle the technique, speech to handle the technique, multi-media technique and open system to design the construction.

In order to cancel the reflecting echo of telephone speech interactive system,the telephone channel and line echo were studied.