15.33: Two spherical speakers separated by 30.0 m each emit a constant fre
az7 kocm*5hl4k*w n*6*g 2*ad wvkcpoquency signal of 57.0 Hz in phase with each other. The speed of sound is 34
*h6* **anmwv4 kwgocckzld7k pa*2o 5 2 m/s. How many locations of complete destructive interference of the incoming signals are there on the line between the speakers?