A conceptual question on sound!?
817575
Velocity of sound  in air is relatively constant.\nAnd formula for the wavelength of sound is, lambda=v/f\n Whence, lambda, v, and f stand for wavelength, velocity of sound in air and frequency respectively.\nhere frequency is written in Hz\nIn view of the equation, as the frequency increases wave length decreases. Hence become short waves.\nOK, tymphanium membrane is a thin and delicate tissue. To cause vibration in the tissue wave should not be too long or short insted it should be within the specified range. \nWhen the wave becomes too short it passes through the membrane insted of causing vibration.\nThis is the cause for inaudibility of sound.
997346
See this all depends.... if this were in the philosophy section, then it could be debatable.  But alas- it's in the botany section, so yes- it does make a sound.  Friction is created as it falls through the air and hits the ground, and that friction causes soundwaves.  Whether someone is there or not is irrelevant.  Humans can only pick up on a certain range of decibels anyways.  That doesn't mean just because we can't hear it, it doens't make a sound.  It just means that we can't hear it.  People need to get unstuck from themselves and think outside the human box.  "If humans can't.... must not be possible."  Meh.
662731
A planet does not produce sound as it moves.\n\nThe ancient people had a term 'musica universalis' (song of the planets), however this does not mean the planets make sounds; rather it was a mathematical concept (the planets were thought to be related by the whole-number ratios of pure musical intervals).
482111
Your question lacks specification so that the answers may clearly give you results according to your expectations. any object can make sound for sound is a wave of energy which is released due to a collision of some sort. sound can be created by speakers which uses a permanent magnet with a coil of wire inside of it which has a electrical current flowing through it which in turn vibrates the speaker to make a electromagnetic wave which we interpret as sound.
260432
Never mind. No question is a stupid question as long as u learn from it. Here's my explanation. Where does sound come from? Sound is actually produced by vibration. As long as it has vibration, it produces sound, no matter how loud or how soft. Even molecules in a solid produces sound because it vibrates, but we can't hear the sound because it is out of our hearing range. Well, as you asked, when a tree falls, it actually vibrates, hence, sound is actuallly produced although we can't hear it. For your second question, IF, lets say you are in the woods and happen to see the tree fall, and you can hear the sound of the fall of the tree. Your question was, how on earth you heard that sound, right? Here's the explanation. When the tree falls, it vibrates. When it vibrates, energy is transfered to the air. The air molecule will then vibrate and the so-called sound wave will then be transmitted into your ears.
42153
To explain this, I would have to use many words, so here's a website to sum it up for you:\nhttp://electronics.howstuffworks.com/speaker.htm
1142877
B through fresh air.  But blow your teacher's mind and ask them what media it is passing through.  After all, since sound is a wave function it is dependent upon the media it passes through.  For example, sound would find it difficult to pass through 3 feet of concrete.
470235
The previous poster is right.  It's particles in the air "vibrating" (caused by pressure differences) that enables you to hear.  That is why in space, which is a vaccuum, you cannot hear anything.  There is nothing to transmit those pressure differences to your ear.
61353
NO IT DOES NOT MAKE A SOUND!\n\nto have a sound you need 3 things\n\na source to produce sound waves in a medium\n\na medium for the sound waves to pass through\n\nand a reciever to detect the sound waves\n\n\ntherefor if you have noe reciever to recieve the sound waves there is no sound.\n\nand MR Um?  i'm sorry but trees do not act as a RECIEVER for sound they in this case would act merely as an attenuation ow the sound due to reflection, scattering, and absorbtion.\n\nYOU DO NOT WANT TO ARGUE WITH AN ACOUSTIC ENGINEER WHEN IT COMES TO TALKING ABOUT SOUND!
1012877
actually, its seconds to the -1 because sound is a measurement of frequency of the sound wave. However, since the frequency is incredibly large for a typical soundwave, the term dB (decibels) came into existence to "compress" it; basically 20*log(f) where log is log base 10 and f is freq gives you the answer in dB.
517188
It is possible to encode sound into light, send it through space, then decode it back into sound.  You can do this by using the amplitude modulation of light.  Basically, you make the light "wiggle" and it then has a pattern of the sound vibrations.  See my sources for complete details.  It also explains step by step how to build such an apparatus.
416196
You'd need a sound converter program.  You can find one easily on www.download.com.
376325
music. music. music. :0)\n\n(isn't that music to your ears?)
962847
Sound relies upoon matter to convey its energy, and it takes time for the matter particles to "bump" into eachother to transport the sound energy, even in a solid. Remember sound is a compression or longitudinal wave.\n\nLight does not rely upon any medium to convey it, so no matter needs to move at all.
376476
The very reason that a violin produced a sound is a feat of physics and dynamics that goes above the heads of 85% of college-educated people, much less the world.\n\nLearn about frequencies, resonances, wavelengths, and the like.  Then see how these can be altered by a 1/100th inch movement of a string.\n\nThen ask your question again, and see if you cannot answer it yourself.
268423
The quality of the sound.
659016
Yes, but it is too difficult to explain. Go to realaudio and they will explain it betttter than me!