Human Effects when Exposed to Low-Frequency Noise or Vibration
The physiological effect of low-frequency noise and vibration peak amplitudes on a body:
Comfort Assessments of Vibration Environments
Vibration Level - Acceleration (m/s2) | Human Perception |
---|---|
< 0.315 | Not uncomfortable |
0.315 - 0.63 | A little uncomfortable |
0.5 - 1 | Fairly uncomfortable |
0.8 - 1.6 | Uncomfortable |
1.25 - 2.5 | Very uncomfortable |
> 2 | Extremely uncomfortable |
- 1 m/s2 = 3.28 ft/s2
Related Topics
• Noise and Attenuation
Noise is usually defined as unwanted sound - noise, noise generation, silencers and attenuation in HVAC systems.
• Physiology
Human physiology vs. air quality, comfort temperatures, activity and metabolic rates. Health effects of gases adn polutions like carbon monoxide and more.
Related Documents
Beams Natural Vibration Frequency
Estimate structures natural vibration frequency.
Decibel A, B and C
Sound pressure filters that compensates for the hearing sensed by the human ear.
Floor Vibrations
Human activities like walking, running and dancing - and operating machines - can introduce floor vibrations due to resonance.
Low-Frequency Vibrations Effects on Building Constructions
Effects of low-frequency vibrations on building constructions.
Noise - Acceptable dBA Level
Acceptable noise - dBA - level at typical common locations.
Noise Criterion vs. Noise Rating and dB(A)
Comparing Noise Criterion (NC, NCB, RNC) to Noise Rating (NR) and dB(A).
Noise Exposure - Permissible Levels and Duration
Exposure to noise should be controlled so that it is less than a maximum combination of exposure level and duration.
pH in Human Biological Material
pH in human materials like blood, salvia and more.
Sound Intensity
Acoustic power of sound per unit area.
Sound Pressure
Sound Pressure is the force of sound on a surface perpendicular to the propagation of sound.
Subjective Effect of Change in Sound Pressure Level
Change in sound pressure level and the subjective human perception.