Can our neck alignment be the issue? It partly can...Sure if your sinuse are all clogged up, it's not going to help but a normal, natural C-curve in the neck keeps all the passage-way as patent as can be.
You see tissue that flaps back and forth can actually cause the noise but keeping the air passage-ways clear and wide open will allow for proper breathing. The video will explain it all. By the way, a neck pillow which is a pilow designed to help maintain or improve that normal necl alignment, can help. In fact, one of the benefits of the cervical traction pillow is that it helps reduce snoring.