Science, Maths & Technology
Sound for music technology: An introduction
...changes of pressure. Answer The following are the correct pairings: 1 and (c) 2 and (b) 3 and (a). The following is the correct text: Sound waves are pressure waves, because they consist of cyclical changes of pressure. Sound waves emanating from a single source in the open (away from buildings etc.) are travelling waves because the pressure variations radiate outwards...