loudspeaker having a diaphragm that vibrates at 970 HzHz is traveling at 70.0 m/sm/s directly toward a pair of holes in a very large wall in a region for which the speed of sound is 344 m/sm/s. You observe that the sound coming through the openings first cancels at 10.4 ∘∘ with respect to the original direction of the speaker when observed far from the wall.   How far apart are the two openings?   At what positive angle would the sound first cancel if the source stopped moving?

University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter17: Sound
Section: Chapter Questions
Problem 112P: (a) At an air show a jet flies directly toward the stands at a speed of 1200 km/h, emitting a...
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A loudspeaker having a diaphragm that vibrates at 970 HzHz is traveling at 70.0 m/sm/s directly toward a pair of holes in a very large wall in a region for which the speed of sound is 344 m/sm/s. You observe that the sound coming through the openings first cancels at 10.4 ∘∘ with respect to the original direction of the speaker when observed far from the wall.

 

How far apart are the two openings?

 

At what positive angle would the sound first cancel if the source stopped moving?
 
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