Some use sound cancelling headphones or earplugs. Those initiated into this path of Surat Shabd Yoga are also given a special technique (mudra) for Inner Sound Meditation. That's revealed at the time of one's initiation by a living teacher. And that is given freely. No money or donation or membership in any organization is required for that. Send me an email and we can chat further about this if you like. James @ SpiritualAwakeningRadio dot com