A small speaker delivers 2 W of audio output. At what distance from the speaker will one detect 120 dB intensity sound?[Given reference intensity of sound as 10-12 W/m2]

A small speaker delivers 2 W of audio output. At what distance from th

1.	A small speaker delivers 2 W of audio output. At what distance from the speaker will one detect 120 dB intensity sound?[Given reference intensity of sound as 10-12 W/m2]
A.	40 cm
B.	20 cm
C.	10 cm
D.	30 cm
Answer» B. 20 cm

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A small speaker delivers 2 W of audio output. At what distance from the speaker will one detect 120 dB intensity sound?[Given reference intensity of sound as 10-12 W/m2]

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