Human Vibration Weighting Filters (Sound and Vibration Measurement Suite)

»Table of Contents

Sound and Vibration Measurement Suite 6.0 Help
December 2007

NI Part Number:
372416A-01

»View Product Info

Human vibration refers to the effects of mechanical vibration on the human body. Excessive exposure to mechanical vibrations can negatively affect the human body. For example, exposure to whole-body vibration from operating machinery can lead to physical problems such as spinal disorders. Measuring and analyzing human vibration signals can help control the negative effects of mechanical vibration on the human body. The following list includes three types of human vibration signals that you might measure and analyze.

hand-arm vibration signals
whole-body vibration signals
low-frequency whole-body vibration signals

The following illustration shows the coordinate system used to measure hand-arm human vibration, as defined by ISO 5348:1986.

The following illustration shows the coordinate system used to measure whole-body human vibration, as defined by ISO 2631–1:1997.

The NI Sound and Vibration Measurement Suite provides weighting filters that you can apply to human vibration signals. Applying weighting to human vibration signals can isolate the directional components that you are interested in and help you further analyze different types of human vibration.

The Sound and Vibration Measurement Suite provides the following weighting filters that you can apply to human vibration signals:

W_b—Weighting for vertical whole-body vibration, z–axis, seated, standing or recumbent person, based on ISO 2631–4.
W_c—Weighting for horizontal whole-body vibration, x–axis, seat back, seated person, based on ISO 2631-1.
W_d—Weighting for horizontal whole-body vibration, x– or y–axis, seated, standing or recumbent person, based on ISO 2631-1.
W_e—Weighting for rotational whole-body vibration, all directions, seated person, based on ISO 2631-1.
W_f—Weighting for vertical whole-body vibration, z–axis motion sickness, seated or standing person, based on ISO 2631-1.
W_h—Weighting for hand-arm vibration, all directions, based on ISO 5349-1.
W_j—Weighting for vertical head vibration, x–axis recumbent person, based on ISO 2631-1.
W_k—Weighting for vertical whole-body vibration, z–axis seated, standing or recumbent person, based on ISO 2631-1.
W_m—Weighting for whole-body vibration in buildings, all directions, based on ISO 2631-2.

Use the W_h weighting filter for hand-arm vibration signals. Use the W_b, W_c, W_d, W_e, W_j, W_k, and W_m weighting filters for whole-body vibration signals. Use the W_f weighting filter for low-frequency whole-body vibration signals.

Note The human vibration weighting filters that the Sound and Vibration Measurement Suite provides comply with ISO 8041:2005 (E): Human Response to Vibration – Measuring Instrumentation.

Human Vibration Weighting Filters (Sound and Vibration Measurement Suite)

Resources