文章摘要
杨小军,沈勇,乐意.混响室中混响时间测量偏差的研究[J].声学技术,2011,(1):93~97
混响室中混响时间测量偏差的研究
Research on the fluctuation of reverberation time measurements in reverberation room
投稿时间:2010-01-07  修订日期:2010-03-22
DOI:
中文关键词: 混响室  混响时间  空间偏差  重复偏差
英文关键词: reverberation room  reverberation time  the spatial variance  the ensemble variance
基金项目:国家自然科学基金(10774075)资助项目
作者单位E-mail
杨小军 南京大学声学研究所近代声学教育部重点实验室, 南京, 210093  
沈勇 南京大学声学研究所近代声学教育部重点实验室, 南京, 210093 yshen@nju.edu.cn 
乐意 南京大学声学研究所近代声学教育部重点实验室, 南京, 210093  
摘要点击次数: 2076
全文下载次数: 2202
中文摘要:
      在混响室中测量吸声材料的吸声系数时,需要进行混响室中有吸声材料时混响时间的测量和没有吸声材料时混响时间的测量,两者的可重复性和可靠性直接影响到所测材料吸声系数的准确度。通过统计声学和波动声学的基本原理对混响室中混响时间测量的空间偏差和重复偏差产生的原因进行了分析,并且在多组不同的实验条件下,在南京大学混响室中实测了空场时的混响时间和有吸声材料时的混响时间。通过比较、分析混响时间测量结果的空间偏差和重复偏差,总结出了混响室中混响时间测量的空间偏差和重复偏差较小的测量条件。
英文摘要:
      When measuring the absorption coefficient of a certain material in reverberation room,the reverberation times of the reverberation room both with and without material need to be measured.The repeatability and reliability of the two measurements in reverberation room affect the accuracy of the measured absorption coefficient of this material.The cause of the spatial variance and ensemble variance of the reverberation time measurement is analyzed with the principles of statistic acoustics and wave acoustics.The reverberation times in the reverberation room of Nanjing university have been measured under different conditions,and the results are compared and analyzed.In the end the measurement condition under which we can get less spatial variance and ensemble variance of the reverberation time measurement is concluded.
查看全文   查看/发表评论  下载PDF阅读器
关闭
function PdfOpen(url){ var win="toolbar=no,location=no,directories=no,status=yes,menubar=yes,scrollbars=yes,resizable=yes"; window.open(url,"",win); } function openWin(url,w,h){ var win="toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=" + w + ",height=" + h; controlWindow=window.open(url,"",win); } &et=FC9DA7BF2F842A3B052390CAC8D82FD0DDBB5D3EA1EB47DB6C62AE2384C4EAA3B2F63181F799B1A9BC10EA5B5E731EBD7164B56569BA6D885F1268069D261B029DD6F58A74534EBB4E4385864817B712A485AFFD52E868AB&pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=DDCFCD5ACE1B1E5A6D46213553C850CA&yid=9377ED8094509821&aid=99960483653&vid=&iid=CA4FD0336C81A37A&sid=39EEF47180459690&eid=C3BF5C58156BEDF0&fileno=20110117&flag=1&is_more=0">