A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 50 dB by an observer 10 km away. (a ) What is the average power generated by the horn? (b) What intensity level of the horn’s sound is observed by someone waiting at an intersection 50 m from the train? Treat the horn as a point source and neglect any absorption of sound by the air.

A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 61 dB by an observer 14 km away.(a) Convert the noise level in dB to intensity. A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 61 dB by an observer 14 km away.(b) What is the average power generated by the horn? A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 61 dB by an observer 14 km away.(c) What intensity level of the horn's sound is observed by someone waiting at an intersection 58 m from the train? Treat the horn as a point source and neglect any absorption of sound by the air. A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 61 dB by an observer 14 km away.(d) What intensity level (in dB) of the horn's sound is observed by someone waiting at an intersection 58 m from the train? Treat the horn as a point source and neglect any…

according to the barometric measurements, the sound has a decibel level of 180 dB at a distance of 161 km. Assuming the intensity falls off as the inverse of the distance squared, what was the decibel level on the island 4800 km away?

The relative intensity of the first harmonic of a sound is 70 dB (1000 Hz). The second harmonic of a sound has the amplitude of a pressure 5 times smaller than that for the first harmonic. What is loudness for the second harmonic if we hear this sound separately?