It is a well known fact that sound travels faster in solids than in liquids than in gases
2007-12-30 21:34:44 · 8 answers · asked by aman s 1 in Science & Mathematics ➔ Physics
THERE IS A AN OPPOSITION TO THE SOUND WVES BY THE SOLID MOLECULES SO THERE IS AN OBSTACLE........!!
2007-12-30 21:44:05 · answer #1 · answered by FUNNY GUY. 4 · 0⤊ 0⤋
Not in my apartment, sound goes right through! :)
2007-12-31 02:56:20 · answer #2 · answered by Thomas E 7 · 0⤊ 0⤋
a good part of the wave is reflected
2007-12-31 01:46:27 · answer #3 · answered by avik r 2 · 0⤊ 0⤋
because the power of solid absorbs the light sound, it is not transmitted to air on the other side
2007-12-30 23:36:09 · answer #4 · answered by Ahmed Zia 3 · 0⤊ 0⤋
When sound (or any wave for that matter) meets a different 'medium' (or in plain English, another material) some of it is reflected. If the medium is very different, such as the wood of a door compared with air, the proportion reflected is very large, in this case almost 100%. So very little sound is transmitted into the wood and not a lot is heard on the other side.
Technically this depends on 'acoustic impedance', but a useful indicator of how much is reflected is the difference in the speed of the wave (sound in this case) in the two materials. In air it is around 300 m/s. In wood several thousand m/s, so a lot reflects.
2007-12-30 22:35:39 · answer #5 · answered by za 7 · 1⤊ 0⤋
Because it is a surface.
I.e. the material of the door is different to the material of the air, and sound has different speeds through doors than it does through air, so where these two different materials meet, sound has to change speed. So some sound reflects or diffracts, some does indeed propogate through it. It is just a smaller percentage that goes propogates through the door.
If you are standing on the other side of a closed door, you may hear what people are saying on the other side of the door because the sound is travelling through it, but the people on the other side will also hear what is being said louder from the much larger proportion of the sound that is reflected on the door back into the room.
2007-12-30 22:09:18 · answer #6 · answered by Lil 5 · 0⤊ 0⤋
Because the sound you hear is travelling through the air, at the door the air has to move the door, and on the other side the door the air again. This causes losses and therefore you hear less noise by closing the door. If the sound originates in a solid, you can hear it better by placing you ear onto it. So if you want to hear what happens at the other side of the door, squeeze your ear against it!
2007-12-30 22:04:24 · answer #7 · answered by Joe from around the world 2 · 0⤊ 0⤋
sound needs a medium fr its propagation..air provides it a good medium but when it comes in contact with door it has to travel from air to door..i.e gas to solid and hence it acts as an obstacle
2007-12-30 21:46:51 · answer #8 · answered by rahul 1 · 0⤊ 0⤋