If I go out into the middle of an empty field with a stereo speaker and stand 50 feet away from it, I will be able to hear the sounds from the speaker even if I place a 10-ft tall ×10-ft wide speaker directly between us (say, at the halfway point between me and the speaker). The physical phenomena most responsible for my ability to hear the stereo despite the barrier is (choose the best answer from the choices below) Select the correct answer A. intensity B. fixed boundary conditions C. absorption D. diffraction
E. wave focusing