The humming connects us with heaven and earth. One of the simplest yet deepest sounds that the human voice can produce is the so-called humming. Regardless of age or musicality, the gently resonating sound vibrates the body and unfolds a calming effect. Scientific studies have shown that the self-generated vibrations help lower pulse and blood pressure, reduce stress, and improve sleep; thus, they promote tranquility and relaxation. Additionally, humming stimulates the production of important neurochemical messengers, such as the release of the "love hormone" oxytocin. The English edition of "The Humming Effect" is a practical guide for conscious humming, aimed at benefiting from the positive effects of sound healing through targeted exercises. The authors explain this.