👉 Countertouch is a term used in computer science and digital signal processing. It refers to a phenomenon where a digital signal, when not properly filtered or processed, can be perceived as being present at frequencies that are outside of the normal range of human hearing. In other words, if you hear sounds that are not naturally occurring, but are detected by your ears, then they might seem like they come from somewhere else. This phenomenon is often used to describe the ability of digital systems to detect and process signals
