Bob is standing at a distance of 100 m from the center of circular train track with radius R = 50 m, observing a train moving with a constant speed of v = 20 m/s. If the motion of the train creates a sound with frequency f=300 Hz (heard by the observer on the train), a) what are the highest and the lowest frequencies that Bob hears? (Take the speed of sound in air to be 340 m/s) b) If he measures the sound level of 50 db when the train is at its farthest distance from him, what is the maximum sound level he measures?
Bob is standing at a distance of 100 m from the center of circular train track with radius R = 50 m, observing a train moving with a constant speed of v = 20 m/s. If the motion of the train creates a sound with frequency f=300 Hz (heard by the observer on the train), a) what are the highest and the lowest frequencies that Bob hears? (Take the speed of sound in air to be 340 m/s) b) If he measures the sound level of 50 db when the train is at its farthest distance from him, what is the maximum sound level he measures?
Related questions
Question
Transcribed Image Text:Bob is standing at a distance of 100 m from the center of circular train track with radius R
= 50 m, observing a train moving with a constant speed of v = 20 m/s. If the motion of
the train creates a sound with frequency f = 300 Hz (heard by the observer on the train),
a) what are the highest and the lowest frequencies that Bob hears? (Take the speed of
sound in air to be 340 m/s)
b)
If he measures the sound level of 50 db when the train is at its farthest distance from
him, what is the maximum sound level he measures?
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 4 steps with 3 images
