If you’ve ever put on a simple, steady tone and suddenly noticed your thoughts lining up instead of scattering, you’ve already had a small taste of what people call 440 Hz frequency benefits. 440 Hz is everywhere in modern music. It’s the standard tuning reference musicians use, but beyond the technical side, many listeners notice that this clear pitch can feel organizing, focusing and mentally “tidying” when used with intention. In this guide, we’ll explore: What 440 Hz actually is How it interacts with your brain and nervous system The most useful 440 Hz frequency benefits for focus and mental…