Two identical sounds A and B reach a point in the same phase. The resultant sound is \( \mathrm{...

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Two identical sounds A and B reach a point in the same phase. The resultant sound is \( \mathrm{C} \). The loudness of \( \mathrm{C} \) is \( n \mathrm{~dB} \) higher than the loudness of A. Find the value of \( n \).
\( \mathrm{P} \)
W.
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