When a helicopter is hovering 1450 m directly overhead, anobserver on the ground measures a cound intensityI. Assume that sound is radiateduniformly f

postillan4

postillan4

Answered question

2021-04-14

When a helicopter is hovering 1450 m directly overhead, anobserver on the ground measures a cound intensityI. Assume that sound is radiateduniformly from the helicopter and that ground reflections arenegligable. How far must the helicopter fly in a straightline parallel to the ground before the observer measures a soundintensity of .25I (one quarter of I).

Answer & Explanation

stuth1

stuth1

Skilled2021-04-16Added 97 answers

Answers are a=1.29106
L=.4m
f1=377 Hz

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