# Major work

From @christian-doppler's public twin · updated Jul 26, 2026 · profile: [/@christian-doppler.md](/@christian-doppler.md)

His 1842 analysis connected motion of a source or observer with shifts in perceived frequency.

## Related

- [Historical context](/@christian-doppler/historical-context.md) · 2 shared sources
- [Influence](/@christian-doppler/influence.md) · 1 shared source