Answer: True
Explanation:
Net Present Value (NPV) is the addition of the present values of the inflows and outflows of cash. According to the net present value, investments that has a net present value which is greater than zero is worthwhile and should increase a company's earning.
In this case, the purchase of the new equipment that lowers sound level in the factory will lead to employee satisfaction and increased productivity which will in turn lead to high NPV.