SEX DIFFERENCES IN THE EFFECTS OF DIVERSE SOUNDS ON HEART RATE VARIABILITY.

Area of Science:

• Psychophysiology
• Auditory Perception
• Cardiovascular Regulation

Background:

• Creating relaxing sound environments in stressful settings like offices is a growing area of interest.
• Understanding physiological responses to sound can inform the design of such environments.
• Heart rate variability (HRV) is a key indicator of autonomic nervous system activity and stress response.

Purpose of the Study:

• To investigate sex-based differences in heart rate fluctuations in response to various auditory stimuli.
• To explore the potential for specific sounds to induce relaxation or stress in different individuals.
• To identify sound characteristics that elicit similar or dissimilar physiological responses between men and women.

Main Methods:

• Electrocardiogram (ECG) data were collected from 23 healthy university students (13 males, 10 females).
• Participants listened to seven distinct sounds.
• Wavelet analysis was used to extract high frequency (HF) and low frequency (LF) components of heart rate signals, with the LF/HF ratio calculated.

Main Results:

• No statistically significant differences were observed between males and females in heart rate fluctuation patterns (no change, increased, or decreased) across all tested sounds.
• Certain sounds exhibited similar patterns of heart rate response in both sexes.
• The specific pairs of sounds that induced highly similar physiological effects differed between male and female participants.

Conclusions:

• While overall sex differences in heart rate response to sounds were not significant, individual responses varied.
• The study suggests that sound's impact on heart rate is complex and may involve sex-specific sensitivities.
• Further research is needed to understand the nuances of auditory stimuli and their psychophysiological effects on different individuals and sexes.