Using an oscilloscope, electronic keyboard, and piano, Bill Nye shows what the waves look like for sounds of varying pitches. He also explains how notes and rhythm play a role in forming what we define as music.
Rachel is woken up in the middle of the night by a loud noise that sounds like a rooster. She is irritable and knocks on Chandler and Joey's door to find out what is making the noise. According to the vet, their chicken is becoming a rooster.