在声纹鉴定中，一般要求录音检材和样本用同一台录音机录制，以减小由录音器材而引起的声纹变异，方便鉴定并提高鉴定的可靠性。但在实际办案中经常遇到检材和样本不是同一台录音机所录，并且由于种种原因而无法补充用录制检材的录音机所录制的样本；或者虽然检材与样本是同一 In the voiceprint identification, it is generally required that the recording materials and samples be recorded on the same recorder so as to reduce the variation of the voiceprint caused by the recording equipment, so as to facilitate the identification and improve the reliability of the identification. However, in practice, the samples and samples often encountered are not recorded by the same recorder, and for various reasons can not be added with the sample recorded audio recorder recorded samples; or although the sample and the sample is the same