In a workplace at 7 locations sound was measured to be 82 dB, 86 dB, 95 dB, 65 dB, 90 dB, 75 dB, 105 dB. If an employee is working in this work place, will he be over exposed to sound if he is working 8 Hours shift.
To determine if the employee will be overexposed to sound, we need to calculate the Time-Weighted Average (TWA) noise level over an 8-hour period.
The formula to calculate TWA is as follows:
TWA = 10 * log10(10^(L1/10) + 10^(L2/10) + ... + 10^(Ln/10))
Where L1, L2,...Ln are the sound levels in decibels for each location.
Plugging in the values from the 7 locations:
TWA = 10 * log10(10^(82/10) + 10^(86/10) + 10^(95/10) + 10^(65/10) + 10^(90/10) + 10^(75/10) + 10^(105/10))
Calculating this gives us a TWA of approximately 86.2 dB.
According to OSHA guidelines, employees should not be exposed to noise levels exceeding 85 dB for an 8-hour shift. Therefore, in this case, the employee would be overexposed to sound and measures should be taken to reduce the noise levels in the workplace to ensure the safety and health of the employees.