Sound is a type of energy that travels through the air, or any other medium, as a vibration of pressure waves. Our ears detect these waves and translate them into the sensation of sound. The study of how sound is produced, transmitted, and received is known as acoustics. BACKGROUND There are many different ways to create sound, but they all involve the vibration of matter. The most common method is to strike an object, like a drum or a gong. When you hit something, it vibrates and sets the surrounding air molecules into motion. These moving air molecules then bump into other air molecules, passing the vibration along until it reaches our ears. Other common methods of making sound include blowing into a wind instrument, plucking a stringed instrument, or striking a tuning fork. In each case, the vibrating object sets the surrounding air molecules into motion, which then travel to our ears and are translated into sound. Audible app stops playing when screen locks iphone There are a...