In a recent journal by SciTechnol explains how expensive measuring respiratory flow is and how a more practical method would be to use a non-contact mcirophone for audio signal recordings taken from a sleep lab or at home to help improve sleep quality.

Sleep is so important for all of us to funtion correctly, mentally and efficiently for our health and well-being. The amount of sleep a person requires differs from one person to another; most adults need about seven to eight hours of sleep each night to feel alert and well rested.
It is important that each and every one of us maintain a healthy sleep pattern. Stress, anxiety, diet and fluids all play their role in which could really affect our sleeping habits.
references and image credit: Journal of Sleep Disorders: Treatment & Care