Even today, concerts and events can be held without using a microphone in the amphitheater-built thousands of years ago, and the sound can be heard very clearly. The branch of science that deals with issues such as ensuring sound propagation and eliminating disturbing reflections is called “acoustics”. We did the experiment called “Can you hear the sound?” with our 6th grade students and made our own membrane phone by doing the experiment. It was a little noisy but great fun.