Low frequency refers to sound waves that have a low pitch and long wavelength, typically below 250 Hz. These sounds are often felt more than they are heard, creating vibrations that can be experienced in various environments, such as music, nature, or machinery. Examples of low-frequency sounds include the rumble of thunder or the bass in music. In the context of electronics, low frequency can also describe signals used in communication systems, such as AM radio broadcasts. These signals can travel long distances and penetrate obstacles better than higher frequency signals, making them useful for certain applications in broadcasting and telecommunications.