When a siren is approaching you, how does the wavelength of the waves reaching you compare to the actual wavelength that the siren emits?

Question

Physics

Quinn Savage

12 February, 15:18

When a siren is approaching you, how does the wavelength of the waves reaching you compare to the actual wavelength that the siren emits?

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Answers (1)

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Annie Stewart · Answer 1

Answer: The wavelength of the sound waves are shorter.

Explanation: When a stationary observer hears an approaching sound in a moving source the observer hears a louder sound since the wavelength of each sound wave is shorter. And as the source moves away from the observer the sound becomes weaker since the wavelength of each sound wave increases causes weaker intensity.