In the “Audio/Visual” accessibility setting, there’s a new option called “Headphone Accommodations.” When you toggle this on, you get a chance to fine-tune how you hear things in your headphones. And if you have a set of AirPods Pro, it works in conjunction with Transparency mode.
You can change the audio from a balanced tone to one optimized for higher frequency sounds or vocals in the middle frequencies. There’s also a slider to adjust how soft sounds are boosted, from slight to moderate to strong. And you can hear these changes as you make them in real-time using the “Play Sample” button. Best of all, you can choose to have these settings apply to media (music, movies, podcasts, etc.) or phone calls or both.