Smartphones nowadays can do everything from give you GPS directions to play you episodes of the Daily Show.
And now, researchers at the University of Washington have figured out how to use your phone to test your lung health.
Patients who have lung conditions such as asthma, bronchitis and cystic fibrosis have their lung health measured using a spirometer, which records what volume of air is breathed in and out. The amount of air breathed out indicates if a patient's air passages are clogged.
Members of computer science professor Shwetak Patel's lab figured out how your phone's microphone could act as a spirometer. Using the sound waves recorded when you breathe out, they are able to estimate how much air you exhale. As MIT Technology Review reports, "In experiments with the iPhone 4S, the system seemed reliable and comparable to home spirometry tests. The group presented that at the UbiComp 2012 conference in September last year."
The way it would work is that the user would call a number and leave a voicemail of an exhalation. Even basic phones, such as those common in developing countries, work well, suggesting that phones could be sued to detect lung disease and monitor lung health remotely.
The system, tentatively called SpiroCall, could then text users their results. But don't hold your breath for a commercial version just yet. The researchers need to continue testing it before it comes to market.