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A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 44 dB by an observer
Posted: Wed Apr 27, 2022 7:46 am
by answerhappygod
- A Train Sounds Its Horn As It Approaches An Intersection The Horn Can Just Be Heard At A Level Of 44 Db By An Observer 1 (15.01 KiB) Viewed 37 times
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 44 dB by an observer 10 km away. (a) What is the average power generated by the horn? x Use the relation between the decibel level of a sound and its intensity and the relation between intensity and total power output. W (b) What intensity level of the horn's sound is observed by someone waiting at an intersection 44 m from the train? Treat the horn as a point source and neglect any absorption of sound by the air. dB