三级午夜理伦三级_99国产私拍视频_久久riAV国产精品_在线播放v?视频免费观看_日韩毛片成人app_亚洲一区二区自慰_亚洲精品无码喷水白浆_精品成人片深夜_日韩av中文字幕自拍_中文无套内谢少妇视频

返回 上一篇 下一篇


Anechoic Chamber

This test chamber is applied to determine the noise and vibration performance of air conditioners or other related products. It is designed as anechoic type or semi-anechoic type. Either the sound pressure level or sound power level test methods can be supplied in this chamber.

It conforms to the ISO, GB and JIS standards. Normally the cut off frequency is able to reach 100Hz, and the background noise is lower than 15dB. Meanwhile, Variable Capacity Refrigeration System is applied to cut down the running cost in this test chamber.


上海佐竹風(fēng)洞介紹