There's also an option to limit the maximum volume. Go to Settings > Sounds & Haptics > Headphone Safety. There, you can toggle on Reduce Loud Sounds ... to increase sound quality on AirPods).

Make sure you don't apply too ... on Audio & Visual. Turn off the "Phone Noise Cancellation" toggle. If the issue persists, ensure your iPhone's software is up to date. If the low call volume ...

The third step was writing the algorithm to detect loud music and adjust the volume accordingly. The Arduino will measure the audio until a sound greater than the dead band value, set with one of ...