When I meditate, I will often use a singing bowl meditation from Insight Meditation App. They are my favorite. In person - it is even more dramatic as not only do the voices get drowned out by the sound - the VIBRATION of the music fills your cells. A gong bath and singing bowls help rebalance All. The. Things. Internally - to the cellular level.
My inner voices rarely shut the hell up. The only reprieve I ever get is when I meditate. I feel ya My Friend. <3