![]() ![]() These acute lower respiratory infections kill nearly 1 million children each year worldwide, causing more deaths than HIV and malaria combined. Worldwide, more kids die of pneumonia and other lung ailments than from any other cause. Will she detect the signs of bacterial pneumonia, give you antibiotics, and recommend that you travel to a hospital in the nearest city? Or will she dismiss the symptoms as signs of a common cold, and send you back home with your son? If she mistakenly sends you home, will your son survive the mistake? ![]() Through the windows, open in the heat of the day, come the sounds of people talking, the thrum of a generator, and the roar of a moped on the main road. She puts on a stethoscope and presses its chest piece against your son’s front and back to carefully listen to his lungs. She’s not a doctor, but she’s been trained to identify and handle routine problems. When the local clinic opens, you wait for your turn with the solitary clinic worker. ![]() You live in Malawi, where your health care options are few. You wake up one morning to discover that your child is ill: His forehead feels hot to the touch, and his rapid breathing has a wheezing sound. They compared the audio heard through a top-notch commercial stethoscope, in which the breathing sounds are mixed with ambient noise, to that heard through the Johns Hopkins smart stethoscope, which uses active acoustic filtering to isolate the breathing sounds. Tech for a Noisy World: Researchers simulated an extremely noisy environment in the lab (the sound meter shows levels of around 70 decibels). ![]()
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