7 Therefore, the PRODUCER shall have the right to manufacture, publish, sell by way of any medium (audio cassette, CD, DVD audio or other existing formats) or via online communication networks (Internet and others), and communicate to the public in any format the phonograms defined in Article 1.
This is how are lungs operate. Inside our bodies, at the base of our lungs there is a membrane called the diaphragm. When you inhale, your diaphragm contracts and flattens out, increasing the volume and decreasing the pressure in your chest. Because you have more room air gets sucked in through your mouth and nose and into your lungs, just like it did in the balloon, and then your lungs fill with air.
It's hard to explain because it's all in how your throat feels when you sing but basically you exert a bit more pressure on the top of your diaphram and close up your throat a bit at the same time. You have to be careful how you do it or it can really rip you up. Practice definitely makes perfect with it though.