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Vibration Characteristics of the Hand and Arm. Report No. 7. Hand-Arm Vibration: A Review of Three Years Research.

PB91188912

Publication Date	1975
Personal Author	Reynolds, D. D.
Page Count	94
Abstract	The transmission of vibration energy from a vibrating tool handle to the hand and arm was investigated. The mechanical model of the hand that was developed during the study described the physical orientation and coupling that exist between the epidermis, dermis, subcutaneous and muscle tissues and the skeletal system in the fingers and hand. The results of the mechanical impedance tests and the curve fitting suggest that the vibration response of the hand due to a vibration input to the hand was primarily indicative of only the local response characteristics of the hand and fingers. Most of the energy directed into the hand and fingers at frequencies above 100 hertz (Hz) for vibration in the vertical direction and at all frequencies for vibration in the horizontal and axial directions was either absorbed or dissipated in the hand and arm. Vibration at frequencies above 100Hz that was directed into the hand and/or fingers was isolated to the hand and fingers. Vibration at frequencies above 150 to 200Hz tended to be isolated to the areas of the hand and fingers in contact with the handle. The attenuation of vibration up the arm occurred in the tissue adjacent to the bone and not in the bone itself. Ruffini's endings and joint capsules and Meissner's corpuscles were responsible for an individual's subjective response to low frequency discrete frequency hand induced vibration.
Keywords	Vibration Occupational safety Frequencies Skin(Anatomy) Muscles Bones Construction Musculoskeletal system Biomechanics Tables(Data) Graphs(Charts) Hand-arm vibration Power tools
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	57W - Stress Physiology 57U - Public Health & Industrial Medicine 94D - Job Environment 41I - Job Environment
Corporate Authors	Texas Univ. at Austin. Dept. of Architectural Engineering.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Supplemental Notes	Presented at the International Occupational Hand-Arm Vibration Conference, Cincinnati, OH., October 28-31, 1975. Sponsored by National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
NTIS Issue Number	199116

Vibration Characteristics of the Hand and Arm. Report No. 7. Hand-Arm Vibration: A Review of Three Years Research.

Vibration Characteristics of the Hand and Arm. Report No. 7. Hand-Arm Vibration: A Review of Three Years Research.
PB91188912

Publication Date	1975
Personal Author	Reynolds, D. D.
Page Count	94
Abstract	The transmission of vibration energy from a vibrating tool handle to the hand and arm was investigated. The mechanical model of the hand that was developed during the study described the physical orientation and coupling that exist between the epidermis, dermis, subcutaneous and muscle tissues and the skeletal system in the fingers and hand. The results of the mechanical impedance tests and the curve fitting suggest that the vibration response of the hand due to a vibration input to the hand was primarily indicative of only the local response characteristics of the hand and fingers. Most of the energy directed into the hand and fingers at frequencies above 100 hertz (Hz) for vibration in the vertical direction and at all frequencies for vibration in the horizontal and axial directions was either absorbed or dissipated in the hand and arm. Vibration at frequencies above 100Hz that was directed into the hand and/or fingers was isolated to the hand and fingers. Vibration at frequencies above 150 to 200Hz tended to be isolated to the areas of the hand and fingers in contact with the handle. The attenuation of vibration up the arm occurred in the tissue adjacent to the bone and not in the bone itself. Ruffini's endings and joint capsules and Meissner's corpuscles were responsible for an individual's subjective response to low frequency discrete frequency hand induced vibration.
Keywords	Vibration Occupational safety Frequencies Skin(Anatomy) Muscles Bones Construction Musculoskeletal system Biomechanics Tables(Data) Graphs(Charts) Hand-arm vibration Power tools
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	57W - Stress Physiology 57U - Public Health & Industrial Medicine 94D - Job Environment 41I - Job Environment
Corporate Authors	Texas Univ. at Austin. Dept. of Architectural Engineering.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Supplemental Notes	Presented at the International Occupational Hand-Arm Vibration Conference, Cincinnati, OH., October 28-31, 1975. Sponsored by National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
NTIS Issue Number	199116