2 ms·
> So, how come it sounds like the sound of the plane is behind the plane? It's got to do with sound attenuation in the atmosphere and your hearing threshold. W
by kqr 4y ago
> So, how come it sounds like the sound of the plane is behind the plane? It's got to do with sound attenuation in the atmosphere and your hearing threshold.
Wait, does it have to be that complicated?
A plane flying X feet above you ought to make the same noise as a plane flying X/2 feet above you, except at 1/4 of the volume, and lagging by something like twice as much (meh trigonometry was never my forte). What am I missing?
- bernulli 4y agoSo why don't you hear the sound when it all begins, right at take-off? That should be the first sound to reach you, no?
- kqr 4y agoI would assume you do, only it's so far away and your ears aren't powerful enough on their own to make it out. (If it can even be picked up over the other background noise.)
- bernulli 4y agoPrecisely, "sound attenuation in the atmosphere and your hearing threshold".
- bernulli 4y agoFor another thought experiment: if you cannot hear that original first sound on take-off, which one can you hear? 10 miles from you? 1 mile from you? That will be the virtual first sound to you, determined by how much weaker the sound has become on its trip through the atmosphere, and how that relates to your hearing threshold. But it will not always and exactly be at the point where the plane has reached its closest point to you (as in the article).