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Physics lo

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Catherinee Lin

This document contains answers to two short questions about hearing. The first question asks if putting a hand beside one's ear can help hear more clearly. The answer is yes, as it uses sound wave reflectivity to increase ear receptivity. The second question asks why a person's voice sounds louder in an empty room compared to a normal room, even if using the same volume. The answer is that an empty room only contains surfaces like walls, floor and ceiling that strongly reflect sound waves, so the original sound and echo reach the ear at the same time. In a normal room, furniture absorbs more sound and reflections are weaker.

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Yiying Lin 15621148 LO7/8 Short answer question: 1. When people cannot hear someones voice clearly, they usually put a hand beside an ear. Can they hear more clearly by doing this? Answer: Yes. It is using sound waves reflectivity to increase the ears 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.

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Physics lo

  • 1. Yiying Lin 15621148 LO7/8 Short answer question: 1. When people cannot hear someones voice clearly, they usually put a hand beside an ear. Can they hear more clearly by doing this? Answer: Yes. It is using sound waves reflectivity to increase the ears 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.