The formula to calculate TWA Noise Exposure is:
\[ TWA = 16.61 \log_{10} \left( \frac{D}{100} \right) + 90 \]
Where:
TWA, also known as Time-Weighted Average, refers to a measurement used in occupational health and safety to assess the noise exposure level over a specific period. It serves as a means to quantify and evaluate the potentially harmful effects of noise on individuals in various work environments. TWA is a crucial metric as it enables organizations to ensure the well-being and safety of their employees. Excessive exposure to loud noise can have detrimental health consequences, including hearing loss and other auditory disorders. By measuring TWA, companies can determine the average noise level workers are exposed to during their shifts and then compare it against permissible exposure limits set by regulatory bodies to maintain a safe working environment.
Let's assume the following values:
Using the formula to calculate \(D\):
\[ D = 100 \left( \frac{8}{2^{(95-90)/5}} \right) = 100 \left( \frac{8}{2} \right) = 400 \]
Using the formula to calculate TWA:
\[ TWA = 16.61 \log_{10} \left( \frac{400}{100} \right) + 90 = 16.61 \log_{10} (4) + 90 \approx 16.61 \times 0.602 + 90 \approx 10 + 90 = 100 \text{ dB} \]
The TWA Noise Exposure is approximately 100 dB.
