This downloadable document gives more details showing how the tonal sounds of the L-Low, M-Medium and H-High cause mucus to resonant or vibrate, how the Random Noise settings help to open and relax the airways, along with indications and contraindications, frequency ranges, and the advantages of the Vibralung.
Linda Hughes was given a prognosis of two to three months to live due to her advanced bronchiectasis. She had tried many different therapies and devices while her condition deteriorated. Together she and her husband Art came up with the idea of using sound to break up the mucus in her lungs. With the rudimentary device Art put together her situation was turned around. This is her story. (Downloadable pdf.)