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Understanding How Speakers Work

Before you can make sounds with your Arduino, you need to understand what sounds are and how humans perceive them. In this first section, you learn about how sound waves are generated, their properties, and how manipulation of those properties can produce music, voices, and so on.

The Properties of Sound

Sound is transmitted through the air as a pressure wave. As an object such as a speaker, a drum, or a bell vibrates, that object also vibrates the air around it. As the air particles vibrate, they transfer energy to the particles around them, vibrating these particles as well. In this fashi...


Cover of Exploring Arduino: Tools and Techniques for Engineering Wizardry


Making sounds and building a micro Piano