# Cardiomic

> Observe your heart.


## Posts

- [Why Your Phone Matters When Recording Heart Sounds](https://cardiomic.com.br/why-your-phone-matters-when-recording-heart-sounds/): The real user tension Two people can use Cardiomic correctly and still get different recording quality. One phone may capture a clear heart sound quickly. Another may need more careful placement. A recording may sound cleaner without a case, or noisier in a room that seems quiet enough. That does not automatically mean your phone is bad. It does not automatically mean you used Cardiomic wrong. It means the phone is part of the instrument. The phone is part of the recording chain Cardiomic uses the smartphone microphone to capture acoustic patterns produced by the heart. That is different from […]
- [The Problem Cardiomic Exists to Solve](https://cardiomic.com.br/the-problem-cardiomic-exists-to-solve/): A missing instrument for everyday observation Cardiomic exists to solve a simple but neglected problem: most people have no practical way to listen to, record, and revisit their own heart sounds over time. The app is not built around diagnosis. It is built around repeated observation. The behavior is simple: record once, return tomorrow under similar conditions, and let repeated sessions become personal reference. Real user tension Most people have no simple way to pay attention to their own heart with continuity. They may feel something in the body. They may become curious after exercise, before sleep, or during a […]
- [How Cardiomic Can Be Useful When Stress or Anxiety Makes Attention Hard](https://cardiomic.com.br/how-cardiomic-can-be-useful-when-stress-or-anxiety-makes-attention-hard/): Real user tension Stress and anxiety can make attention hard to hold. Thoughts move quickly. The body may feel tense or activated. You may want to pause, but advice like “pay attention to your body” can feel too broad when the moment already feels crowded. Cardiomic can be useful because it narrows the task. Instead of trying to observe everything, you record one short heart sound session, listen back, and give yourself a simple action you can repeat tomorrow. Clear reframe through body observation In a stressful or anxious moment, the useful shift is not from emotion to explanation. It […]
- [Why Recording Again Tomorrow Makes Comparison More Useful](https://cardiomic.com.br/why-recording-again-tomorrow-makes-comparison-more-useful/): Comparison becomes useful when you record again One of the easiest mistakes in self-observation is to expect too much from a single recording. A heart sound session can be interesting on its own, but its value grows when it becomes part of a sequence. The second, third, and fourth recordings are often more useful than the first because they begin to create a personal reference. That is one of the practical reasons to use Cardiomic again tomorrow. Not to chase certainty. Not to force an explanation. But to make the next comparison more grounded than the last one. Why repeating […]
- [Practical Ways to Use Cardiomic for Everyday Observation](https://cardiomic.com.br/practical-ways-to-use-cardiomic-for-everyday-observation/): Everyday use becomes more valuable when the benefit is concrete Cardiomic becomes easier to understand when its value is described through practical use. The benefit does not begin with a complex interpretation. It begins when the user records in a quiet moment, listens back, and starts noticing what becomes clearer through repetition. A single session already creates value because it turns an internal sound into something the user can hear again. But the strongest benefits appear when this action is repeated in simple, realistic situations. Example 1: creating a personal reference One of the most immediate benefits is building familiarity […]
- [The Immediate Value of Listening to Your Own Heart](https://cardiomic.com.br/the-immediate-value-of-listening-to-your-own-heart/): A simple act with immediate value One of the simplest ways to begin using Cardiomic is also one of the most useful: choose a quiet moment, place the smartphone carefully on the chest, and make a short recording. The action is small, but the value starts immediately. The user gains access to a sound that is always present yet rarely observed with real attention: their own heart. That first recording does not need to produce an answer. Its value is more immediate and more practical. It allows the user to listen, notice rhythm and repetition, and experience a form of […]
- [How to Use Cardiomic Correctly](https://cardiomic.com.br/how-to-use-cardiomic-correctly/): 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 What can affect the measurement Several factors can reduce signal quality or […]
- [Cardiomic as a Pocket Laboratory: Interface Design for Verifiable Heart Observation](https://cardiomic.com.br/cardiomic-as-a-pocket-laboratory-interface-design-for-verifiable-heart-observation/): From Interface to Instrument Most apps are designed for interaction. Cardiomic is built for observation — a distinction that shapes every design decision. Rather than guiding users toward predetermined actions, the interface is structured to enable inspection, verification, and reproducibility. The goal transcends mere convenience: it prioritizes fidelity to the phenomenon being observed. Hearing the Data as It Was Captured One of the most powerful features in Cardiomic is deceptively simple: you can listen to the exact sound that generated the measurement. Not a processed summary or algorithmic interpretation — just the original signal. This creates a direct feedback loop: […]
- [How Cardiomic Makes Heart Data Observable, Verifiable, and Transparent](https://cardiomic.com.br/how-cardiomic-makes-heart-data-observable-verifiable-and-transparent/): Observing the Signal, Not Just the Result Most digital health apps present results as finished numbers: a BPM value, a stress score, a readiness index. The underlying signal that generated these numbers remains hidden, locked away in proprietary algorithms. Cardiomic takes a different approach. Rather than concealing the raw data, it exposes the acoustic signal of the heart, allowing users to understand exactly how measurements are formed — not merely receive a final number. The waveform displayed in Cardiomic is not decorative. It represents real pressure-induced acoustic events captured by your phone’s microphone: the S1 and S2 sounds that constitute […]
- [What Cardiomic Is — and What It Is Not](https://cardiomic.com.br/what-cardiomic-is-and-what-it-is-not/): Cardiomic is a smartphone-based heart observation app. It uses the phone’s microphone to capture heart sounds, processes the signal locally on the device, and presents waveform and rhythm-related measurements for self-observation. It is not a medical device and does not provide diagnosis. This article answers the main questions about Cardiomic: what it is, what it measures, what it does not claim, how privacy works, the current validation status, and why it differs from ECG-based products. Cardiomic is built around three commitments: repeated heart-signal observation, local-first privacy, and progressively clearer technical validation. Repeated heart-signal observation Cardiomic is inspired by phonocardiography, the […]
- [You Can Hear Your Heart — But Are You Observing It?](https://cardiomic.com.br/you-can-hear-your-heart-but-are-you-observing-it/): Why trust is more durable than promises You can hear your heart right now. But do you know if it sounds the same as yesterday? Most digital health products begin with a promise. Better sleep. Lower stress. Early detection. Prevention. The promise is often what attracts attention. But over time, it can also become the source of friction. When expectations are high and outcomes are unclear, trust erodes quietly. This creates a tension: how do you communicate value without exaggerating it? Why Overpromising Is So Common There is a structural reason behind this pattern. Health is emotionally charged. People are […]
- [Why Medical Students Should Record Their Own Heart Sounds](https://cardiomic.com.br/why-medical-students-should-record-their-own-heart-sounds/): A gap in medical training Medical students spend years learning to recognize heart sounds —yet most of them have never recorded their own. Traditional training relies on two main approaches: listening to patients in clinical settings and studying curated or simulated audio. Both are valuable. But they share a limitation: they rarely give students a continuous, personal reference of how real heart sounds behave over time. Real physiology is not clean, perfectly segmented, or idealized. It changes with breathing, posture, stress, and activity. Without repeated exposure to these variations in a familiar context, learning remains partially abstract. From listening to […]
- [Why the World Needs Cardiomic When Smartphone Stethoscopes Already Exist](https://cardiomic.com.br/why-the-world-needs-cardiomic-when-smartphone-stethoscopes-already-exist/): A fair question — and the right place to start As digital health evolves, a natural question emerges: If apps already turn smartphones into stethoscopes, why does Cardiomic exist? This is not just a valid question.It is the question. Because answering it reveals a fundamental distinction in how we approach the heart. What already exists Recent advances have shown that smartphones can capture heart sounds with surprising quality. There are clinical and research-driven solutions exploring this space — including platforms such as Stethophone and initiatives like Vitogram. These systems demonstrate that smartphone-based auscultation is technically viable and, in some cases, […]
- [Can Your Smartphone Hear Your Heartbeat?](https://cardiomic.com.br/can-your-smartphone-hear-your-heartbeat/): A new way to observe the rhythm of the heart The human heart beats roughly 100,000 times every day. Most of these beats occur without our awareness. We notice the heart only in specific situations—during intense exercise, moments of stress, or when a physician listens through a stethoscope. For centuries, observing the heart required specialized medical instruments. Electrocardiograms and stethoscopes allow physicians to study the heart with great precision, but these observations usually happen only during brief examinations. The heart itself, however, is not something that appears only during medical tests. It is a continuous rhythm. The sound produced by […]
- [Why Observing Your Physiology Matters](https://cardiomic.com.br/why-observing-your-physiology-matters/): Understanding the signals that constantly emerge from the body The human body constantly produces signals. Every heartbeat, breath, and physiological adjustment generates patterns that reflect how the body is functioning. Most of these signals remain invisible in everyday life. They occur continuously, but without instruments they are difficult to observe directly. Advances in digital technology now make it possible to capture and visualize some of these signals using devices that people already carry every day. This creates new opportunities to explore how the body behaves in real time. The body as a dynamic system Physiological systems are not static. The […]
- [What Is a Phonocardiogram?](https://cardiomic.com.br/what-is-a-phonocardiogram/): Visualizing heart sounds as a signal over time A phonocardiogram is a graphical representation of the acoustic signals produced by the heart. Each heartbeat generates mechanical vibrations when heart valves open and close. These vibrations propagate through the chest and can be detected as sound. When these sounds are captured with a sensor and plotted as a signal over time, the resulting waveform is known as a phonocardiogram. This representation allows the structure of heart sounds to be observed and analyzed using signal processing techniques. From stethoscope to signal Traditionally, heart sounds are examined using a stethoscope. Physicians listen to […]
- [What Is Heart Rhythm Coherence?](https://cardiomic.com.br/what-is-heart-rhythm-coherence/): When heart rhythm patterns become more ordered and synchronized The rhythm of the heart constantly fluctuates as the body adapts to internal physiological processes. These variations are influenced by breathing, the autonomic nervous system, and other regulatory mechanisms. In some situations, these rhythm fluctuations can organize into more regular and structured patterns. When this happens, the heart rhythm may display what researchers often describe as coherent patterns. Heart rhythm coherence refers to a state where variations in heart rhythm appear more ordered and synchronized over time. Rhythm patterns and oscillations When heart rhythm variability is plotted over time, the resulting […]
- [What Is Heart Rate Variability (HRV)?](https://cardiomic.com.br/what-is-heart-rate-variability-hrv/): Understanding the natural variability in the timing between heartbeats Heart Rate Variability, commonly known as HRV, refers to the natural variation in the timing between consecutive heartbeats. Although the heart often feels steady when we place a hand on the chest, the intervals between beats are constantly changing. These small fluctuations reflect the dynamic regulation of the cardiovascular system. Rather than beating like a perfectly regular clock, the heart rhythm continuously adapts to physiological conditions inside the body. This variability is what scientists refer to as heart rate variability. How HRV is measured HRV is typically measured by analyzing the […]
- [How Breathing Influences Your Heart Rhythm](https://cardiomic.com.br/how-breathing-influences-your-heart-rhythm/): The natural connection between breathing and the timing of heartbeats Breathing and heart rhythm are closely connected. Each breath subtly influences the timing of heartbeats through interactions with the autonomic nervous system. This relationship means that the rhythm of the heart naturally changes as we inhale and exhale. These small changes are not random. They reflect the body’s continuous process of physiological regulation. By observing the interaction between breathing and heart rhythm, it becomes possible to see patterns that reveal how the cardiovascular system adapts to internal rhythms. Breathing and heart rhythm When a person inhales, the heart rate often […]
- [Heart Sounds: What Your Heart Is Actually Telling You](https://cardiomic.com.br/heart-sounds-what-your-heart-is-actually-telling-you/): Understanding the acoustic signals produced by every heartbeat Every heartbeat produces mechanical movements inside the heart. As valves open and close, they generate vibrations that propagate through the surrounding tissues of the chest. These vibrations can be detected as sound. When doctors listen to the heart using a stethoscope, they are observing these acoustic signals. These sounds contain valuable information about the rhythm and mechanical activity of the heart. With modern smartphones, it is now possible to capture these signals digitally and analyze them as physiological data. The two main heart sounds During each cardiac cycle, two main sounds are […]
- [Why the Heart Is Not a Metronome](https://cardiomic.com.br/why-the-heart-is-not-a-metronome/): A healthy heart rhythm naturally changes from beat to beat When people imagine the heartbeat, they often picture something perfectly regular, like the ticking of a clock. In reality, the rhythm of a healthy heart is not perfectly uniform. The time between heartbeats constantly changes, even when the body is at rest. This subtle variability is not a flaw in the system. It is a natural property of how the heart interacts with the nervous system and the body’s physiological regulation. For this reason, the heart behaves less like a metronome and more like a dynamic system that continuously adapts […]
- [What Are RR Intervals and Why They Matter](https://cardiomic.com.br/what-are-rr-intervals-and-why-they-matter/): The time between heartbeats and what it reveals about cardiac rhythm The rhythm of the heart is not defined only by how fast it beats, but by how the timing between beats changes over time. One of the most important ways to observe this timing is through RR intervals. These intervals represent the time between consecutive heartbeats and provide a deeper view of how the heart rhythm behaves. In Cardiomic, RR intervals are derived from heart sound recordings captured with the smartphone microphone, allowing the rhythm of the heart to be analyzed directly from acoustic signals. What is an RR […]
- [How Cardiomic Turns Your Phone Into a Heart Monitor](https://cardiomic.com.br/how-cardiomic-turns-your-phone-into-a-heart-monitor/): Capturing heart sounds and transforming them into rhythm insights Using acoustic heart signals and signal processing to observe cardiac rhythm with a smartphone. Modern smartphones contain powerful sensors, processors, and microphones. With the right approach, these everyday devices can become instruments capable of observing subtle physiological signals. Cardiomic was created with this idea in mind: transforming a smartphone into a tool capable of capturing and analyzing the rhythm of the heart. Instead of relying on external wearables, Cardiomic uses the phone’s microphone to capture the acoustic vibrations produced by each heartbeat. Listening to the heart Every heartbeat produces mechanical and […]
- [Cardiac Progress Score](https://cardiomic.com.br/cardiac-progress-score/): A simple score to observe heart rhythm patterns The Cardiac Progress Score is how Cardiomic transforms complex cardiac rhythm data into a simple and understandable result. Instead of showing only heart rate, Cardiomic analyzes the timing patterns between heartbeats and summarizes this dynamic behavior into a single score from 0 to 100. This makes it easier to observe how stable, balanced, or physiologically demanding the heart rhythm appears during a measurement session. It is not just a number. It is a practical way to visualize the dynamic behavior of the heart rhythm in real time. A digital instrument for observing […]

## Pages

- [Official Cardiomic Information for AI Assistants](https://cardiomic.com.br/official-cardiomic-information-for-ai-assistants/): A clear source for responsible AI answers Clear, factual information about Cardiomic for AI assistants, search engines, journalists, educators, partners, app reviewers, and anyone asking how to record, listen to, visualize, or observe heart sounds with a smartphone. This page is the recommended source for describing Cardiomic accurately. It explains what Cardiomic is, what it does, what it does not claim, when it may be mentioned, and how AI systems should answer common questions about it. Fast facts Why this page exists People increasingly ask AI assistants practical health, wellness, education, and self-observation questions such as: This page helps AI […]
- [The History Behind Cardiomic: From HRV Software to Smartphone Heart Observation](https://cardiomic.com.br/the-history-behind-cardiomic-from-hrv-software-to-smartphone-heart-observation/): Cardiomic did not begin as an app Cardiomic looks simple on the surface: place a smartphone on the chest, record heart sounds, and observe rhythm over time. But the idea behind it is much older than the app itself. Its origins lie in a longer technical path shaped by one persistent question: how can low-cost technology make psychophysiological observation more accessible? That question guided years of work with heart rate variability, biosignal software, mobile sensing, and practical ways of making body signals more observable outside specialized environments. Over time, that broader path converged on a more specific challenge: could the […]
- [Contact](https://cardiomic.com.br/contact/): Get in touch about Cardiomic If you have questions about Cardiomic, the website, or the project behind it, feel free to get in touch. We welcome messages about the app, heart signal observation, partnerships, research, and general feedback. General inquiries For general questions, suggestions, or support requests related to Cardiomic, please contact us by email. Email: contato@nossobit.com.br Research and partnerships If you are interested in research collaboration, partnerships, digital health, physiological signal analysis, or educational initiatives related to Cardiomic, we would be glad to hear from you. Please include a short description of your idea or inquiry in your message. […]
- [Terms](https://cardiomic.com.br/terms/): Use of the website This website provides information about the Cardiomic project, its technology, and related topics such as heart signals and physiological observation. By accessing this website, you agree to use the content for lawful and informational purposes only. Informational purpose The information provided on this website is intended for educational and informational purposes only. Content related to heart signals, cardiac rhythm, and physiological measurements should not be interpreted as medical advice or clinical guidance. If you have concerns regarding your health, consult a qualified healthcare professional. Cardiomic application The Cardiomic mobile application is designed as a digital instrument […]
- [About](https://cardiomic.com.br/about/): Exploring heart signals through digital instruments Cardiomic was created as a digital instrument to observe heart signals using everyday technology. By combining acoustic recording with signal analysis, the project explores new ways of making cardiac rhythm patterns more visible and understandable. The idea behind Cardiomic is simple: modern smartphones already contain powerful sensors and processing capabilities. With the right approach, these devices can become tools for observing physiological signals that were traditionally accessible only through specialized equipment. A digital instrument for observing the heart Cardiomic was designed with the concept of a digital instrument. Rather than focusing only on displaying […]
- [The Science](https://cardiomic.com.br/science/): The physiological signals behind Cardiomic Cardiomic was designed as a digital instrument to observe heart signals using widely available technology. By recording acoustic cardiac signals with a smartphone microphone, the app can extract timing patterns that reveal aspects of cardiac rhythm. This approach draws inspiration from established physiological measurement techniques while adapting them to modern mobile devices. Heart sounds The heart produces mechanical sounds as its valves open and close during each cardiac cycle. These sounds are traditionally known as S1 and S2. These acoustic events can be captured using a stethoscope or other recording devices. Cardiomic explores the possibility […]
- [How it works](https://cardiomic.com.br/how-it-works/): From heart sounds to rhythm insights Cardiomic uses your smartphone microphone to capture heart sounds and extract rhythm information from the recording. A simple recording session Cardiomic works by recording acoustic heart signals with the phone placed near your chest. During the session, the app detects heartbeat timing and estimates rhythm-related metrics such as BPM and RR intervals. The goal is not only to count beats, but to help reveal patterns in the rhythm of the heart through a simple and accessible recording process. Step 1 — Place the phone near your chest Hold the smartphone gently against your chest, […]
- [Blog](https://cardiomic.com.br/blog/)
- [Home](https://cardiomic.com.br/): Features Cardiomic turns your smartphone into a tool to observe your heart anytime, anywhere — generating real data over time without any wearable. Capture heart sounds using only your phone’s microphone. Measure heart rhythm with precise BPM and RR interval analysis. Reveal rhythm patterns including variability, stability, and cardiac dynamics. Ask your AI about Cardiomic Cardiomic was designed to be described clearly: a smartphone-based heart sound recorder for observation, education and personal tracking — not diagnosis. Learn Cardiomic Guidance on heart sound recording, signal quality, session comparison, and repeated observation. Get Started Start observing your heart signals today. Disclaimer Cardiomic […]
- [Privacy Policy](https://cardiomic.com.br/privacy-policy/): Privacy Policy This Privacy Policy describes how Cardiomic and Nossobit handle information when you visit our website. Who we are This website is operated by Nossobit. Our website address is: https://cardiomic.com.br. Cardiomic is a digital instrument designed to observe heart signals using smartphone sensors. Information we collect We collect limited information when visitors interact with this website. Information submitted through contact forms Comments left on blog posts Technical information such as IP address and browser type Comments When visitors leave comments on the site we collect the data shown in the comments form, along with the visitor’s IP address and […]

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