Can any audible sound be associated with a note on a musical scale?
1) “sound is vibration that propagates through air […] What causes the vibration of the air is usually the vibration of other objects–vocal chords, musical instruments, speakers, and so on. Most noises in nature, such as those made by wind blowing through branches or by ocean surf breaking at the shore have no distinct frequency signature. They also carry very little useful information for us. What carries more information are sudden changes in volume (a broken branch) or sounds with definite frequency signature (animal call or insect buzz). Detecting changes in volume is rather easy, but recognizing frequency signatures is not. To understand the importance of frequencies in the sound, we have to look both at how sounds are generated and how they are perceived. Many objects generate sound waves when they oscillate. […] What is important is this repeating pattern of movements that distinguishes sounds from noises. A sound has a pitch, which is determined by the frequency with which
