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'Tis the old question, 'if a tree falls in the forest and there is nobody there to hear it, does it make a sound?' I would venture the answer to that is no, but it does make vibrations.
Ah! But are you not describing vibration.
Even someone who is deaf may be able to feel some of these vibrations. But 'sound' is what our brain interpets those vibrations into.
So if a object vibrates at high speed(for audible sound) series of compression and depression will be formed and we will hear sound. Frequency will determine its pitch and amplitude will determine loudness. Suppose only one object is vibrating. So for a given time there would be only one kind of sound i.e. for a given time freq will be 'x' but only 'x', as the vibrating object can not vibrate at two different speed at same time.My question is, then how speakers make sounds of different instruments etc. at same time?I hope the whole film/layer(i don't know the exact word) in the speaker moves simultaneously so there is no possibility that different parts make different sounds.Is that due to persistence of hearing(like vision) so speakers make different sounds very fast that we are not able to distinguish between them and we feel that it's coming all as one??
My question is, then how speakers make sounds of different instruments etc. at same time?
Is that due to persistence of hearing(like vision) so speakers make different sounds very fast that we are not able to distinguish between them and we feel that it's coming all as one??
... the superposition principle can be applied. That means that the net amplitude caused by two or more waves traversing the same space is the sum of the amplitudes which would have been produced by the individual waves separately.