The document discusses definitions of music and its key parameters. Music has been debated by philosophers and scientists throughout history, with definitions varying by region and society as music is subjectively perceived. The word "music" originated from Greek and Latin roots and has evolved over time. Acoustics is the science of sound and hearing, studying how sound behaves. Key musical parameters include pitch (highness or lowness), volume (amplitude of sound wave), duration (length of sound wave), and timbre (quality or tone color of voices and instruments).