點解空心既門比實心既容易傳聲？

你試下放舊野落口度講野同就咁許度講野邊個大聲d咪知@@

2008-09-15 15:37:04 補充：
我承認我是來亂的，但這是最淺易明白的方法。

The reason is apparent.

A lighter object can be set into vibration with larger amplitude than a heavier object by the same impulse. This is the reason why objects with high density (e.g. bricks or concrete) are more effective in the shielding of sound. Concrete-built houses are thus more sound-proof than wooden houses.

Doors made from a solid piece of wood definitely have higher densities. To set such doors into vibrations needs a larger pressure from the sound waves, and hence could shield off sounds more effectively.