31. He connected the diaphragm of a microphone to a needle. 32. They shared a diaphragm , sternum, chest wall and abdominal wall. 33. The next step is to test whether diaphragms can prevent HIV transmission. 34. The surgery involves threading tiny wires through small incisions in the diaphragm . 35. Diaphragms and caps are often used in conjunction with spermicides.36. All of these manners of articulation are pronounced with an diaphragm ). 37. In diaphragm , which separates the pulmonary cavity from the visceral cavity. 38. The double button carbon microphone with stretched diaphragm was a marked improvement. 39. Some designs avoid sliding surfaces altogether by using diaphragms for sealed pistons. 40. Sustained paralysis of the diaphragm muscle causes death by asphyxiation.