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Q. No.When two identical loudspeakers playing the same frequency are placed equidistant from an observer, a sound of \(60\) dB is heard if the sources are in phase with each other. However, if the two speakers are out of phase, no sound is heard. If the speakers are played with a phase difference of \(90^\circ,\) the sound heard will be:
1. \(30\sqrt2 \) dB
2. \((60+\sqrt2) \) dB
3. \(57\) dB
4. \(60\sqrt2 \) dB
1. \(30\sqrt2 \) dB
2. \((60+\sqrt2) \) dB
3. \(57\) dB
4. \(60\sqrt2 \) dB
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Subtopic: Â Pressure Wave in Sound |
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