Sound signals are vibrations that travel through the air or other mediums, creating waves that can be detected by the human ear or other devices. These signals can be produced by various sources, such as musical instruments, voices, or electronic devices. They are characterized by properties like frequency, amplitude, and wavelength, which determine their pitch and loudness. In communication, sound signals play a crucial role. For example, telephones convert sound waves into electrical signals for transmission over distances. Similarly, radios and televisions use sound signals to convey information and entertainment, allowing people to connect and share experiences through audio content.