Hello Dear georgejean,
Speaking from my own experiences and this is something that you will be more familiar with withIN yourself as you make your way through your own progress through this process.
One way to alleviate the distractions is to cover your ears with ear muffs or head phones, even without sound at first.
Breathing is interesting and again I am only sharing from what I realized in going through this. The times when I would 'catch' my breath in deep relaxation is where my 'wall' to trust is. I know this may sound strange yet this is what I realized. This allowed me to take my breath deeper with this realization. You just take it deeper one breath by breath.
Deep breathing and deep relaxation allows you to move past the feeling of being in your body or limited by the physical boundaries. It's like exercising a muscle really. The more you do this, the more you will recognize it for what it is. And now, you can trust that this is 'normal' and go deeper.
It's about applying as in ongoingly by not limiting ourself when we feel anxious, excited or fearful of the experience. Moving through the limitations.
Yes, you will hear 'other' sounds. I call this decompressing, moving through the spheres of our perceived perceptions.
I InCourage you to be patient here and to continue doing what you are for now by just moving your breath deeper. Feel your Breath moving through to the 'edge' of all your extremities and then 'pushing beyond your 'edges'. Focus on breath moving like water and not so much focused on where your body 'stops' is my suggestion. With continually doing this, you will 'break' through this stage and can then apply more of the methods which Adrian suggests in his book in chapter 72, page 353 on Deep Physical Relaxation.
May this be helpful for you is my Heart's Intention,
Relax and be patient with yourself, you are on your way.
Love and Blessings,