Deep sleep with auditory stimulation poses benefits to the heart, specifically the left ventricle, causing it to contract and relax more vigorously, according to the results of a study from the University of Zurich. Investigators noted that blood is pumped more efficiently through the circulatory system, which will benefit most organs, extremities, and the brain.1 When the individual fell into deep sleep, a series of brief tones at frequencies known as pink noise played. The series was 10 seconds of pink noise, followed by 10 seconds of silence, then repeated. Investigators monitored whether the sound enhanced deep sleep and whether it influenced the individual’s heart rate and blood pressure.
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Saturday, June 28, 2025