8Hz

8Hz is a frequency in the electromagnetic spectrum that lies within the very low frequency (VLF) range of the radio band. It corresponds to a period of 0.125 seconds, meaning the wave completes 8 cycles per second. This frequency is far below the range used for conventional radio communications and is typically generated and used in experimental research and specific industrial applications.

In physiological studies, 8Hz is sometimes referenced as the frequency of certain brainwave patterns, specifically the theta band, which is associated with relaxed wakefulness or light sleep. However, unlike higher brainwave frequencies such as alpha (8–13Hz) or beta (13–30Hz), the theta band covers a broader range and its lower end around 8Hz is sometimes linked to creative thinking or meditative states. Because neural signals are typically recorded by electroencephalography (EEG), researchers analyze data in this frequency range to explore cognitive and emotional processes.

Beyond biology, 8Hz signals have been employed in signal processing demonstrations, particularly in the visualization of waveform amplitude and phase. In the field of physics, simple harmonic oscillators with a natural frequency of 8Hz serve as low‑frequency examples for studying damping, resonance, and other dynamic phenomena. Due to its low power and minimal ear sensitivity, 8Hz is generally considered inaudible and is rarely used in audible music or voice applications.