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- 1. Yiying Lin 15621148 LO7/8 Short answer question: 1. When people cannot hear someone’s voice clearly, they usually put a hand beside an ear. Can they hear more clearly by doing this? Answer: Yes. It is using sound wave’s reflectivity to increase the ear’s receptivity. 2. Why people always feel that they are talking louder in an empty room rather than a normal room tough they are using the same voice? Answer: Because in an empty room, there are only walls, floor and ceiling, which can reflect the sound waves, and the distance is not far, so the original sound and echo are received at same time by the ear. However, in a normal room, there are sofa, bed and cupboard, which cannot reflect the sound waves as strong as a wall can.