despite the fact that today everybody but me and some fellow rwth-students might be drunk celebrating altweiber, here is something to reminisce about old days (older than me actually..) with dende 74. meanwhile i'm off to the university learning..
Sound is a travelling wave which is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations
Cool.
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