http://www.epd.gov.hk/epd/tc_chi/contact_us/contactus.html作者: Billy 時間: 2004-10-26 16:50:56
I measure immediately in my office.
Only "wind" sound from Air condition already 58dB.
Not possible.
I think it is a average value.
For example measure for 1 hour most of time is 38dB but there is 1 second at 130dB the average can still 39dB.作者: Pooh Pooh 時間: 2004-10-26 22:06:26
係咪計鮮風機.... :em18:
無可能咁少........作者: H and H 時間: 2004-10-26 23:03:46