In a textile mill, workers spend 2 hours preparing stock in an area where the sound level is 92 dBA, and 2 hours 40 minutes around the machine area. The remainder of the 8-hour day is spent in an area where the sound level is 70 dBA. Determine the maximum sound level around the machine area that is allowable according to the OSHA criteria

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Free undamped vibrations

Whenever an object/system displaces in either side of its equilibrium position with the help of an external/internal means, then the object/system moves regularly or randomly on both sides of its equilibrium position. This motion is called vibration. Generally, there are three types of vibration: longitudinal vibration, transverse vibration, and torsional vibration.