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Here’s how Samsung describes the feature: “With the Zoom-In Mic, you can use a pinch gesture on the screen while recording video to zoom in or out, and as you zoom in, the sounds of the subject you zoom in on become louder. Given how useful it is, it was only a matter of time until the smartphone industry emulated it, bringing it to our fingertips under the official term of Audio Zoom.

This ability of our brain to do this, studied in psychoacoustics, is called the Cocktail Party Effect. The phenomenon of our brain’s ability to focus on a precise auditory element while filtering out all other sounds is called the “Cocktail Party Effect.”