Herzklang is an acoustic representation of the variability of your heart rate (HRV)
The heart - our natural rhythm giver
Simply considered, heart rate variability (HRV) is the natural rise and fall of your pulse rate as a response to your breathing, blood pressure, hormones, stress and emotions.

What does our heart rate variability tell us?
The greater your HRV, the better the regulation and thus health of your heart and nervous system. In this way, HRV reflects your entire psycho-physiological (mind, soul and body) inner balance and health.
Why is the topic of HRV so important?
Scientific studies show that HRV is a reliable indicator of a variety of risks of chronic diseases, behavioral disorders and even mortality.
HRV measurements give important feedback about the state of the autonomic nervous system (ANS) and its individual reactions to stress and disease. HRV represents a reliable gauge of the ANS regulatory ability, particularly with regard to regeneration after stress and diseases.
Everything that strengthens the balance and resilience (energy) of your ANS – reflected in the HRV – improves immune regulation and consequently the overall state of health.
What restricts heart rate variability?
If you face a stressor, your body must respond with an appropriate answer. This performance and stress response takes the form of increased heart rate and blood pressure, release of specific hormones, tensing of the muscles, etc. All these activities are natural and necessary.
Problems arise if your body responds too often in this way and is not given enough time to recover between challenges and thus return to balanced equilibrium. The result is consistently elevated heart rate, reduced HRV, persistent and extreme levels of damaging stress hormones, suppressed immune activity and the development of stress related symptoms and disease.