Noise masking covers up, or masks, unwanted sounds with a pleasant sound. So, you hear the pleasant sound and not the unwanted sound. With SoundOff, you hear pink noise instead of snoring or some other annoying sound. Studies have shown that pink noise actually calms the brain and helps you sleep.
Pink noise is a smooth consistent sound; it doesn’t change in volume or frequency. After a while your brain doesn’t even hear it in a way. Your brain just tunes it out; kind of like when you turn on a fan; you hear the fan, but after a while your brain just gets used to it and you really don’t hear it anymore. It’s because the sound of the fan is constant and doesn’t change in fluctuation. This is noise masking. Noise canceling reduces ambient sounds. With noise canceling you still hear the sound (or sounds) but not as loud. Noise canceling works better for low frequency droning sounds. So, a loud hum is a quieter hum. The sound of an airplane engine is a less loud airplane engine, but you still hear the engine. Noise canceling isn’t great at reducing sounds that change in volume and frequencies like snoring or banging or the human voice. Noise cancellation can make it possible to listen to audio content, like music, without raising the volume excessively due to ambient noise.