54. Two speakers positioned 2m from each other and reproduce the same musical tone at 1000 Hz. The receiver is located at a distance of 4 m from the center speaker. Considering the speed of sound is 340 m / s, determine how far from the center line parallel to the dynamics necessary to push the receiver, so he gave the first interference minimum.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)