A pilot study on the human body vibration induced by low frequency noise

Area of Science:

• Biomedical Engineering
• Acoustics
• Human Physiology

Background:

• Low-frequency noise exposure is a growing concern for public health.
• Understanding human body's response to vibration is crucial for health impact assessment.
• Existing methods for measuring body vibration may lack sensitivity in specific frequency ranges.

Purpose of the Study:

• To develop and validate a sensitive measurement method for human body vibration induced by low-frequency noise.
• To investigate the characteristics of body vibration across different locations (chest and abdomen).
• To explore the relationship between noise-induced vibration and physiological factors like Body Mass Index (BMI).

Main Methods:

• Designed a measurement system utilizing a miniature accelerometer.
• Conducted preliminary measurements on 6 male subjects exposed to pure tones (20-50 Hz).
• Recorded vibration levels on the chest and abdomen.

Main Results:

• The developed method successfully detected body surface vibrations.
• Vibration levels and their rate of increase with frequency were higher on the chest than the abdomen.
• Noise-induced vibration showed a negative correlation with subjects' Body Mass Index (BMI).

Conclusions:

• The mechanical structure of the human body influences vibration transmission.
• Physical constitution, indicated by BMI, plays a role in the body's response to noise-induced vibration.
• Health effects of low-frequency noise are influenced by both biomechanical factors and individual physical characteristics.