Acceleration is often used as a measure of vibration exposure for the following reasons: The amount of exposure is determined by measuring acceleration in the units of m/s 2. How hard a person grips a tool affects the amount of vibrational energy entering the hands therefore, hand-grip force is another important factor in the exposure assessment. Vibration frequencies and duration of exposure are also determined. Vibration exposure direction is also important and is measured in defined directions. A complete assessment of exposure to vibration requires the measurement of vibration acceleration in meters per second squared (m/s 2).
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