Sound has profound effects on human development and physiology from early life stages through adulthood. Studies show sound's rhythms shape brain development before birth and regulate physical movements, while pitch and musical structures can improve cognitive skills. Sound is intimately involved in our biological functions. Ancient cultures recognized sound healing, and modern research is exploring therapeutic effects of sound on stress reduction, pain management, and conditions like cancer. Frequencies from voices, instruments, and mantras can transform cell structures and consciousness through vibration.