摘要
介绍了ＬＳ２ｐ型标准传声器的声中心测量。测量装置的自由场偏差小于０．１ｄＢ，坐标测距系统准确度优于０．０５％，分辨力为０．０１ｍｍ。声中心测量结果与ＩＥＣ／ＣＤ１０９４－３，２９（ｓｅｃ）２７９标准草案提供的数据进行比较，在２～２０ｋＨｚ频率范围内两者的声中心位置相差±０．１ｍｍ，而在２５ｋＨｚ和３１．５ｋＨｚ两频率分别有５８ｍｍ和１０．
The acoustic centre measurements of type LS2p laboratory standard microphones are summarized. The free field deviations of measurement equipment are less than 0.1dB. The accuracy of coordinate distance measurement system is better than 0.05%, and its resolution is 0 01mm. The measured acoustic centre data have been compared withthe data of IEC/CD 1094-3, 29(sec)279, differences between them are ±0.1mm in2～20kHz frequency range. There are differences of 5.8mm and 10.0mm in 25kHz and 31.5kHz respectively.
出处
《计量学报》
CSCD
1996年第4期280-282,共3页
Acta Metrologica Sinica
关键词
声中心测量
标准传声器
测量
Type LS2p
Acoustic centre
Standard microphone
Free-field
