Two sources of sound have intensities 1w/m2 and 0.001w/m2 and a distance of 1m. what is the difference in sound intensity level (sil) of these two sources?
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Ответ:
I(L) = 10log (I / Io)
We use Io equal to 10^-12 W/m2. We calculate as follows:
I(L) = 10log (1 W/m2 / 10^-12 W/m2) = 120 dB
I(L) = 10log (0.001 W/m2 / 10^-12 W/m2) = 90 dB
Therefore, the difference between the sources would be 30 decibels.
Ответ: