What is the approximate frequency range of vibration that is hazardous to humans?

The frequency range of vibration that is considered hazardous to humans typically falls between 1 to 100 Hz. Within this range, body response to vibration can lead to negative health effects. Low-frequency vibrations, particularly in the range of 1 to 100 Hz, can influence the human body's biomechanics and physiological responses. This can include a range of issues such as discomfort, reduced ability to control body movements, and long-term effects like damage to internal organs, especially when exposure is prolonged.

Vibrations within this frequency range are significant because they can resonate with the body's natural frequencies, leading to amplified effects. For instance, vibrations around 4-6 Hz can affect the seated human body and cause discomfort or harm due to whole-body resonance. Vibration exposure protocols and safety measures are designed to minimize risks, especially in occupational settings where individuals may be subjected to sustained exposure.

The upper range options, such as 200 Hz or even 500 Hz, generally correspond to frequencies that are less likely to create the same level of biomechanical stress on the body compared to the lower frequencies, leading to the conclusion that the range of 1 to 100 Hz is where hazards are most pronounced.