Excessive vibration has the potential to cause harm to humans. For example, the use of power tools can result in Hand Arm Vibration Syndrome (HAVS) see http://www.hse.gov.uk/vibration/hav/index.htm. This is preventable, but once the damage is done it is permanent. For this reason it is important to be very careful with any equipment that causes vibration of the hand and arms.
Following best practice in the control of hand-arm vibration we have established safe time limits for the use of the vibrotactile equipment in the Musical Vibrations system, in accordance with the Control of Vibration at Work Regulations. In addition the hand and foot ‘shakers’ are electronically controlled to limit the amount of vibration that they will allow.