Why a given sound is louder in a hall than in the open?

1.	Why a given sound is louder in a hall than in the open?
Answer» Solution :In a hall, repeated REFLECTIONS of sound take place from the walls and the ceiling. These REFLECTED sounds mix with original sound which RESULTS in increase the INTENSITY of sound. Butin OPEN, no such a repeated reflection is possible. sound will not be louder as in hall.

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