Question:

QUESTION 17 The intensity of a certain sound wave is 4x10-4 W/m2. If the intensity level of the sound increases by 30 dB, the in

QUESTION 17
The intensity of a certain sound wave is 4x10-4 W/m2. If the intensity level of the sound increases by 30 dB, the intensity has increased to...
Ca. 1.2x10-2 W/m2
b.
14.0x10-2 W/m2
* 4.0x10-1 W/m2
d. 1.33x10-1 W/m2

QUESTION 17 The intensity of a certain sound wave is 4x10-4 W/m2. If the intensity level of the sound increases by 30 dB, the intensity has increased to... Ca. 1.2x10-2 W/m2 b. 14.0x10-2 W/m2 * 4.0x10-1 W/m2 d. 1.33x10-1 W/m2

Answer

de
As B= lo log1. I 2
lo logie I2.5 3ødB =ló logio Iz
II
I
3 3=1891, 12) = (10) = 12 => [p, XL
Clos = 1Xl
ज
PR = 4 X164x102= 4X15W/m2]
option
3

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