The use of certain information about the response data to questions asked by the newcomer to vibration measurement. Here is a brief explanation for the following: Vibration as a machine condition indicator, troubleshooting charts and vibration of the human body.
It has long been recognized that the effects of direct vibration on the human body can be serious. Workers can be affected by blurred vision, loss of balance, loss of concentration, etc. In some cases, certain frequencies and vibration levels of can permanently damage internal body organs.
Researchers have been compiling data over the last 50 years on the physiological effects of vibrating, hand-held power tools. The "white finger" syndrome is well known among forest workers handling chain saws. Gradual degeneration of the vascular and nervous tissue takes place so that the worker loses manipulative ability and feeling in the hands.
Standards recommend maximum allowable vibration spectra at the handles of hand-held power tools.
The first published international recommendation concerned with vibration and the human body is ISO 2631 — 1978 which sets out limitation curves for exposure times from 1 minute to 12 hours over the frequency range in which the human body is most sensitive, namely 1 Hz to 80 Hz. Later versions of the standard include more details.
The recommendations cover cases where the human body as a whole is subjected to vibration in three supporting surfaces, namely the feet of a standing person, the buttocks of a seated person, and the supporting area of a person lying down.
It is interesting to note that in the longitudinal direction, that is feet to head, the human body is most sensitive to vibration in the frequency range 4 to 8 Hz. While in the transverse direction, the body is most sensitive to vibration in the frequency range 1 to 2 Hz.
A battery-operated vibration meter dedicated to the measurement of vibratory motion concerning its ability to cause discomfort or damage to the human body is available.
GET THE FULL HANDBOOK
MEASURING VIBRATION
BY BRÜEL & KJÆR
SIGN UP TO D OWNLOAD NOW
The use of certain information about the response data to questions asked by the newcomer to vibration measurement. Here is a brief explanation for the following: Vibration as a machine condition indicator, troubleshooting charts and vibration of the human body.
What happens when a budding rock star trades in his electric guitar for medical books? In Peter Michael Nielsen’s case, the result is an invention that relieves pain in a unique way.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
