I just want to make sure I know these things correctly for an upcoming test, so if anyone can let me know, correct me (especially on the bolded stuff), or give me some extra info, that'd be great! -Music has a constant waveform (sinusoidal), meaning it consists of musical notes with constant frequencies. Noise, on the other hand, is a bunch of random frequencies and therefore has no constant waveform. -Lower frequencies have a lower pitch and longer wavelengths. Higher frequencies are higher pitches with shorter wavelengths. -Notes have a higher consonance the smaller the ratio between them. -The scientific scale starts on 256 Hz and uses simple ratios. This works best for violins. -The musician's scale is equitempered and is made up of 12 notes. It starts on A 440 Hz. -The frequency of a string depends on four things: length of the string (inversely proportional to f), the tension of the string (square root proportion to f), diameter of the string (inversely proportional to f), and the density of the string (inverse square root proportion to f). -Nodes, points where there are no movement, always occur at fixed ends of a string. These are points of destructive interferences. -Equally spaces antinodes are points of max constructive interference. -When a string vibrates fully, in it's fundamental mode, its lowest possible frequency, the fundamental frequency, is produced (f0). -When the string vibrates in divided segments, overtones are produced. These harmonics are whole-number ratios of the f0 because there must always be fixed nodes at the end. I do not understand why overtones emit more than one frequency. -What exactly is resonance? Can someone please explain the difference of semi-open and open tubes (other than the obvious. haha.) I don't understand why semi-open tubes are 1,3,5.. and open tubes are 1,2,3... What do these numbers mean? -Sound waves are transverse, while a wave created in a rope, for example, is longitudinal. What is the difference about how they are created and how they look on a graph?This is not a homework question.. I'm just confused. -What is a standing wave pattern and how is it made? Thank you so much!