Yes Quophi,taking deep breathes before spiritual exercises helps with relaxation.
With practice,you'll begin to hear actual sounds.lt could be roar of the sea, single note of a flute,thinking of bells,buzzing of bees and many other sound.These are all the sound of HU heard at different rates of vibration.
These are actual sounds. When l first experienced this l thought someone in the group was playing a prank.
The wonderful thing with practicing the HU Chant is that you do it where and when you want. There's no control figure. You set up your own spiritual laboratory and observe,experience or record your experiences.
HU is a spiritual gift to the world. People of all faith can use HU.