Hello all, First of all, let me say that I am aware that a higher amplitude doesn't translate into a higher frequency. However, my understanding of how for example a string vibrates makes me draw other conclusions. From what I understand, hitting a string with a particular force makes the string vibrate over a certain width distance x. The time duration in which that string goes up and down (2x = 1 period) once during the vibration determines the frequency of the waves it generates. Thus it depends on the speed in which the string travels over 2x. Now, if I hit the string harder, it would have a higher amplitude and thus it would vibrate over a wider distance (> x). However, to keep the frequency, the string has to go up and down in the same time interval as previous. But since the width distance of string vibration has increased, the string has to travel faster over that width distance to keep the same time interval for 1 period. If the string has to travel faster, doesn't it give more kinetic energy to the air molecules which results in the high pressure column of airmolecules in soundwaves moving faster as well? If so, how can faster moving high pressure columns of air not result in a higher pitch since pitch also depends on the speed of the waves?