The influence of the sounds of crying baby and the sounds of violence on haemodynamic parameters and autonomic status in young, healthy adults.

Introduction: There is evidence that various stimuli affect the balance in the autonomic nervous system (ANS) and the functioning of cardiovascular system.

Objective: The aim of the study was to assess whether the sounds of crying baby and the sounds of violence affected haemodynamic parameters and ANS in young, healthy adults and to measure differences in these reactions between the genders and these 2 stimuli.

Methods: Haemodynamic parameters (measured non-invasively by the NEXFIN device), heart rate and blood pressure variability (HRV and BPV, respectively) and baroreflex sensitivity (BRS) were analyzed in 65 adults (21 women, mean age: 23years) during a 15-minute rest followed by the emission of two 5-minute acoustic stimuli: sounds of crying baby and sounds of violence emitted randomly and separated by a 4-minute pause.