MOLECULAR IMPACT OF SOUND. “Sound waves elicit changes at the molecular and physiological level, including the levels of polyamines and important phytohormones (e.g., indole acetic acid and abscisic acid, the regulation of antioxidant enzymes, the uptake of oxygen, the synthesis of RNA and soluble proteins, and perhaps most importantly, gene expression.”
http://beheco.oxfordjournals.org/content/24/4/789.full