The measured sound pressure level at 2 meters from a centerline grinder is 96 dBA. What is the sound pressure level at 4, 8, and 10 feet (5 points). There is an automotive machine shop, and an employee is located an equal distance from 6 metal stamping presses, each of which produces noise at 106 dBA. What sound pressure level would the employee be exposed to if all 6 metal stampers were operated simultaneously? (5 points)