Get the latest Science News and Discoveries
From burns to the wave nature of heat – via the telegraph equation - EurekAlert
When a train approaches or an ambulance with its siren blaring nears us, we hear the sound with an increased frequency, gradually decreasing slightly. As it passes, the frequency changes abruptly to a lower one, then decreases further. This commonly encountered Doppler effect can be a valuable clue to the nature of a phenomenon seemingly completely unrelated to sound propagation: heat transport.
None
Or read this on Eureka Alert