If you've ever seen anyone talking to their plants to help them grow, it's because some people have speculated for years that sound can affect the growth and behavior of plants, just as it affects people and animals. The type of sound used can also influence the plants in a positive or negative way.
Dorothy Retallack conducted experiments in the 1970s that involved playing soothing music to plants in one room while playing rock music to plants in another. The result was that the plants "listening" to the soothing music, played by string instruments, leaned toward the speakers and grew to be quite healthy, but the plants subjected to the rock music leaned away from the speakers, withered and died.
Retallack also conducted studies with other types of music. She found that plants did best with classical, jazz and Indian classical music like Ravi Shankar, and the plants that did the worst listened to rock and acid rock.
One small, independent study conducted by Don Robertson (inspired by Retallack's studies) showed that not all types of classical music are to the liking of plants. When the melodious, harmonic music of Palestrina was played, the plants did quite well. When the more negative, dissonant music of Arnold Shonberg was used, the plants died.
Experiments with music might lead to healthier, more abundant food sources. One study done by the National Institute of Agricultural Biotechnology in South Korea experimented with playing classical music to rice plants in fields and noted a faster growth rate for frequencies between 125 Hz and 250Hz. They also noted less active growth genes in the plants that were exposed to sound waves at 50Hz.