(May 4, 2021 at 1:49 pm)Ranjr Wrote:
Right. So it is all about proximity and relitivity.
But to someone who isn't the engineer, who is going to precieve the sound as being the same, if you are the observer, ahead of that train coming toward's you, the soundwaves are going to compress and seem louder as the approach, and sound lower and lower the longer it passes you.