A little trick I've found for this is to listen to the same few(3-4) sets or plays of 30-40 minute each (i.e Bach cantatas). Your brain gets familiar to the progression so it tunes out so they're not distracting as new music(radio etc) and at 30% volume is enough to block out voices and not make your head dizzy. Also you can take little breaks after each one ends, so you're essentially doing Pomodoros[0].