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However , an important step to implement new timing plans is to validate the plans ' effectiveness in the field . However , we found out that it was not a good idea because the intensity of the sound decreases in quadratic fashion with distance , which meant that the car can only detect the direction of the sound from very short distance ( 2 or 3 feet away ) . However , we have the embryo of a register of members ? However , because the warning statement requirement may nevertheless allow contaminated juice products to reach the marketplace , FDA does not expect the statement to be as effective in protecting consumers as would a validated 5-log reduction program .