Busy street 的聲源級 約80dB（分貝）

來源: gweipwu 於 2018-11-21 10:04:47 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (381 bytes)
  • From 80 to 90 dB we are getting closer to the danger zone, but the risks are limited to very long exposures.
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