When I was in eighth grade, my science project was on the theory of audiotropism, also called phonotropism, which is the effect of sound on the growth of plants. I planted three pans of soil with winter rye grass. One pan was exposed to rock and roll music (WABB on my little transistor radio) for two hours daily. Another pan was exposed to slow music (WALA) for two hours daily. The third pan of grass had no exposure to music at all.