Audio signals are representations of sound that can be captured, transmitted, and played back. They are created when sound waves, which are vibrations in the air, are converted into electrical signals by devices like microphones. These signals can then be processed, stored, or transmitted through various media, such as radio waves or digital files. When we listen to music or speech, our devices convert these audio signals back into sound waves. This process allows us to enjoy our favorite songs or hear conversations over the phone. The quality of audio signals can vary, affecting how clear and enjoyable the sound is, which is why speakers and headphones are designed to enhance this experience.