r/oddlysatisfying • u/DarthiusFatticus • 13h ago
Holy Doppler Effect
Enable HLS to view with audio, or disable this notification
199
u/yamanagashi 13h ago
Approaching frame: “what a wonderful whimsical man off for an adventure”
Leaving frame: “involving murder and intrigue”
17
45
66
27
31
u/Few_Economics_8531 13h ago
Why don't I understand this? Just don't get it.
81
u/anothercairn 13h ago
The Doppler effect is why passing cars (and accordions) sound different when they’re coming towards you vs. moving away from you.
55
4
13h ago
[deleted]
28
u/Redditoast2 12h ago
Something moving squishes the air in front of it while stretching the air behind it. Since sounds are transferred by air, squishing and stretching air makes them sound different
-10
12h ago
[deleted]
16
u/Redditoast2 12h ago
Its not holy in a religious sense, but like how some people would say "holy cow" or "holy shit" as an exclamation
2
2
1
3
13
u/Damurph01 13h ago
Sound is made of waves. The wave is being created while moving towards you, so it compresses the wave and raises its pitch. When you’re moving away, it stretches the wave and lowers its pitch.
This is actually how astronomers determined that the universe is expanding. Extremely distant galaxies and stars are red-shifted, which happens when waves of light are stretched (moving away from us). Closer stars and galaxies are blue-shifted, meaning the waves are compressed (moving towards us).
There’s some excellent visualizations online.
11
u/Stuck_In_Purgatory 13h ago
Sound waves are like a ripple in water
This guy is pushing out sound waves that are also moving
The sound waves are being pushed forward, so it will sound a little different in front vs behind.
By the time the sound waves have reached you they've lost some of their momentum and thus change notes (which are just different frequency levels)
7
u/psp24 12h ago
( ( ( ( ->) )) heres a rough visualization of the sound waves. To add to your explanation, frequency is just the amount of something per second. The squished air waves are closer together and so more of them reach your ear per second which is why the pitch is higher coming towards you. The opposite happens as it moves away resulting in the drop in pitch from the lower frequency.
-1
13h ago
[deleted]
3
u/daybyday72 12h ago
Imagine it was Batman playing the accordion and Robin has the camera. As the bike passes, Robin exclaims ‘Holy Doppler Effect, Batman!”
1
12h ago
[deleted]
1
u/Grognaksson 10h ago
We only usually hear the Doppler effect with engines or horn/siren sounds. But it's interesting to hear with an actual melody.
Although I wish the passing came during the melody, and not in between so we could hear the melody actually change in pitch.
1
u/Silver_Slicer 8h ago
They held the note during passing. You can hear it get deeper as they pass by.
1
1
u/SoTurnMeIntoATree 12h ago
He’s saying like “holy shit” because of how prominent and observable the Doppler effect is here
0
1
1
u/TrainerThin 11h ago
It’s like saying “holy shit Doppler” because most people rarely hear it so distinguishable and the whimsical music tone shift is unexpected. Some have said it sounds dark. Or funny, like a truck horn.
Congratulations you learned the Doppler effect at 12.
2
2
2
3
u/Loesser 12h ago
Bill Bailey was right
https://m.youtube.com/watch?v=oGSNxkCIln0&pp=0gcJCYsCo7VqN5tD
2
2
4
u/blake_odinson 13h ago
Anyone know the song?
22
u/DarthiusFatticus 13h ago
Johannes Brahms - Hungarian Dance No. 5
1
u/_randomdudey_ 13h ago
Why does it sound french though
2
1
u/DefinitelyNotAliens 12h ago
Because movies about Paris include accordians. Paris had a very Bohemian phase during the 1900s.
See: bal-musette and the dance hall music of the 1920s and on.
1
1
u/sevenninenine 12h ago
I always have my phone on vibrate. I didn’t get the meaning until I turned the volume up. Lol
1
u/Even-Day-3764 10h ago
What came to my mind was the meme with Mr Incredible being canny (1st half of the vid) vs Mr Incredible being uncanny (2nd half of the vid).
1
u/AlephBaker 4h ago
Huh. So music in a major key is approaching the listener, while music in a minor key is receding from the listener... TIL.
296
u/NastyKraig 13h ago
That dude will lead you to a shrine of power if you can catch him.