Definition
High frequency refers to a rapid rate of vibration, measured in Hertz (Hz). It describes waves that oscillate quickly, producing high-pitched sounds or electromagnetic waves with short wavelengths. High frequency sounds are perceived as high in tone, like a whistle or a soprano's highest note. In the context of electronics, high frequency signals are used in radio communication and other wireless technologies. It's the opposite of low frequency, which has slower vibrations. Think of it as a hummingbird's wings beating incredibly fast.