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Why do we hear a roaring or humming sound when an empty bottle is held close to our ear ?
When I heldhold a flask close to my ears, I heardhear like a sound which I felt like coming from its interior.
Why do we hear a roaring or humming sound when an empty bottle is held close to ear ?
When I held a flask close to my ears, I heard a sound which I felt like coming from its interior.
When I hold a flask close to my ears, I hear like a sound which coming from its interior.
