Doppler effect problem (observer is moving away)

AI Thread Summary
Ben, walking at 1.2 m/s, hears a 10 dB sound from a bird located 2 m away when he is closest to it. The discussion clarifies that the problem is not primarily about the Doppler effect, as Ben's speed has minimal impact on frequency. Instead, the focus is on how sound intensity diminishes with distance. The key factors to consider include the initial sound intensity and the rate at which sound intensity decreases as Ben moves away from the bird. Understanding these principles will help determine how long Ben continues to hear the bird.
Emmanuelle
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Ben is walking in a park in a straight line at 1.2 m/s. A bird is hiding in a bush. When Ben is closest to the bush, he is 2 m away from the bird and he hears a 10 dB sound. How long will he continue to hear the bird?

Thanks for your help!
 
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Emmanuelle said:
Ben is walking in a park in a straight line at 1.2 m/s. A bird is hiding in a bush. When Ben is closest to the bush, he is 2 m away from the bird and he hears a 10 dB sound. How long will he continue to hear the bird?

Thanks for your help!

This isn't about the doppler effect. A speed of 1.2 m/s won't affect frequency much. It's more about how distance affects sound intensity. There are some assumptions to be made here.
 

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