For speech communication , noise and interference will make listener fatigued and affect intelligibility and articulation of speech . as a result , it is necessary to design corresponding device to reduce noise in wireless speech communication . this thesis focus on the basic theory of speech processing , the key technologies to reduce noise in speech and the design and implementation of corresponding noise reduce devices 由于無線語音在傳輸過程中不可避免地會受到風(fēng)、雨、雷、電的干擾;還有來自周圍環(huán)境的干擾及通信設(shè)備內(nèi)部電噪聲等的干擾,使得原始的純凈語音成為被噪聲污染的帶噪語音,從而對無線語音通信的質(zhì)量產(chǎn)生嚴(yán)重影響。