For much of the history of the wristwatch, mechanical movements were perfectly content to tick along at 2.5 or 3 Hz, ...

Sound can be represented with both analog or digital audio signals. Analog audio signals use electrical voltage levels. Different types of transducers convert sound to electrical signals and ...

Cerebellum (Latin for "little brain") in red. Cerebellar means "related to the cerebellum." Source: Life Sciences Databases/Creative Commons (CC-BY-SA-2.1-jp) Beta-frequency deep brain stimulation ...