What happens to my heart rate and heart rate variability (HRV) during Sound Bath Meditation?

For many years, we conduct Free Meditation @ Wellness Space (also known as Sound Bath Meditation using Singing Bowls, details here). From time to time, we do simple studies to understand how the body and the mind responds to such meditations.  This article shares a case study of an individual before, during and after meditation with the focus on key parameters of our nervous system (heart rate, heart rate variability). Dr Chirag Zaveri, who comes regularly for the free meditation agreed to participate in this simple study and also consented when we asked if we could share his name on