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Decibel dB (1m) - Measurement ofsound output >
The sound level can be measured but no preciseindication exists for the range of the sound. Too
many unknown factors affect this value: type of
sound, speed and direction of the wind, humidity,
fog, rain etc. etc. The data shown in the following
table are useful as theoretical indication.The strongness of a signal is always relative -see table on the right. An increase of 3 dB is heard as a doublesound level. Hearing threshold Diffusion of sound waves - Sound intensity
Distance >
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