What the app does
Cardiomic uses your smartphone’s microphone to capture subtle acoustic signals from the body and observe heartbeat-related patterns. Because it depends on real-world sound conditions, the quality of the result is strongly affected by how the phone is positioned, how still you remain, and how quiet the environment is.
Cardiomic is not a medical device and does not provide diagnosis. It is a self-observation tool and is only useful when the captured signal is clear enough to be interpreted reliably.
How to use it correctly
- Choose a quiet place Stay away from voices, television, traffic, fans, or wind. Cardiomic uses the microphone, so surrounding sounds can interfere with the signal.
- Place the phone directly on your chest For the best result, place the phone in direct contact with your chest. Thick clothing, multiple layers of fabric, or loose positioning can weaken the signal.
- Keep both your body and the phone still Small movements can disturb the reading. Sit or lie down comfortably, keep the phone steady, and avoid moving your shoulders, arms, or torso during the measurement.
- Breathe naturally There is no need to exaggerate your breathing or hold your breath. Breathing normally helps reduce unnecessary tension and makes the signal easier to capture.
- Give the app a few seconds Cardiomic may need a short period to stabilize and detect a usable signal. Let the reading continue without interruption before deciding whether it worked or not.
What can affect the measurement
Several factors can reduce signal quality or make the result unreliable:
- background noise such as voices, television, wind, fans, or traffic
- thick clothing or multiple layers between the phone and the chest
- body movement or shifting the phone during the reading
- placing the phone incorrectly or without firm contact
- forced breathing, tension, or other body-generated noise
- trying to measure in a rushed or unstable situation
Signs that the measurement is not valid
Some signs suggest that the app is not capturing a usable body signal:
- the microphone is picking up voices or other external sounds
- results vary too much across repeated attempts taken under similar conditions
- heartbeat values change abruptly without a plausible reason
- the signal seems weak, unstable, or inconsistent
- the result does not seem to match what you would expect from a stable reading
What to do if it does not work
If the measurement does not work well, do not assume the app has failed right away. First, check the basics:
- are you in a quiet place?
- is the phone directly on your chest?
- is there clothing blocking the microphone from the body?
- are you keeping both your body and the phone still?
- did you give the app enough time to stabilize?
Then try again under better conditions. In many cases, improving the environment and positioning is enough to produce a much better result.
Important limitations
Cardiomic has important limitations that users should understand:
- it is not a medical device
- it does not replace clinical evaluation or medical tests
- it depends heavily on signal quality
- it is sensitive to noise, contact, movement, and context
- a poor measurement condition can lead to an unusable result
Conclusion
Cardiomic works best when it is used as an observation tool under the right conditions. A quiet environment, direct contact with the chest, and a stable position make a real difference. The better the signal, the more useful the observation becomes.