15.33: Two spherical speakers separated by 30.0 m each emit a c
k-n5 n 9tf61evi+nm* .itcx e8gh,lvmonstant frequency signal of 57.0 Hz in phase with
xc8*nk t-5i+mte. ,vnni6gfvlmhe 19 each other. The speed of sound is 342 m/s. How many locations of complete destructive interference of the incoming signals are there on the line between the speakers?