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Your headphones are knowing about your heart rate
 Measuring Heart Rate Using Ultrasonic Sound Waves with Existing ANC Wearables 30.Oct.23 7:05 AM By Shawn Highstraw Photo Photobank |
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In a groundbreaking study, Google has delved into a revolutionary technique capable of capturing users' heart rates using their current wireless ANC (Active Noise Cancelling) wearables. This innovative method, known as "audioplethysmography," harnesses ultrasonic sound waves to pinpoint the human heartbeat. Audioplethysmography operates by transmitting an ultrasonic, low-intensity sound signal through the speakers of ANC earphones or headphones, as elucidated by Google. This signal subsequently generates echoes, which are detected by the wearable's built-in microphone. According to the research team, this approach tracks the subtle movements of the skin's surface within the ear canal caused by the circulation of blood. This data can then be processed to provide heart rate measurements and heart rate variability assessments through a model crafted by the researchers. The researchers argue that existing wearables equipped with heart rate monitoring capabilities often rely on an abundance of sensors, including photoplethysmograms and electrocardiograms, necessitating the integration of complex microcontrollers within earbuds or headphones. Google highlights that this not only increases the cost and weight of the wearables but also accelerates battery depletion. As a result, Google sought to devise a method for heart rate measurement using existing wireless earbuds featuring active noise reduction, all without the need for hardware modifications. Google's audioplethysmography stands out in its adaptability; it works effectively across diverse ear canal sizes, various skin tones, and even in the presence of background music. The technique remains resilient even when the earbuds fit loosely, addressing a common challenge during physical activity. The researchers overcame these hurdles by employing multiple frequencies and selecting the most accurate among them. In the concluding remarks of their research, Google asserts that this technique consistently provides precise heart rate and heart rate variability measurements. The researchers contend that audioplethysmography can effortlessly transform any true wireless stereo ANC wearable into a heart rate monitor through a straightforward software upgrade. According to Google, this groundbreaking advancement unlocks new possibilities for affordable health monitoring. | |
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