The equal loudness contours fordiscrete frequency bands of the complex sound.3. The rule by which loudness addsas the discrete frequency bands of thecomplex sound are added.If speciï¬cations 1, 2 and 3 can beestablished, then the loudness of the Fig. 3âThe frequency response characteristics of the octave band pass filters.
Ideally, you want the tip of the thermometer to be in the center of the roast. Remove the roast when the meat's internal temperature reaches 160 degrees F. A four-pound roast may take one-and-three-quarters of an hour to two hours to cook.Let the roast set for about 15 minutes after removing it from the oven and before carving. If the pork roast is done, the meat will be whitish, not pink. four-pound roast may take one-and-three-quarters of an hour to two hours to cook. Let the roast set for about 15 minutes after removing it from the oven and before carving. If the pork roast is done, the meat will be whitish, not pink.
Some people like their pork roasts less well done, but the USDA wonât have it. In a 325Â°F (160Â°C) oven, it will take between 35 and 40 minutes per pound to reach a center temperature of 160Â°. So you could check it after 2-1/2 hours, but it may take as long as 3 hours.ome people like their pork roasts less well done, but the USDA wonât have it. In a 325Â°F (160Â°C) oven, it will take between 35 and 40 minutes per pound to reach a center temperature of 160Â°. So you could check it after 2-1/2 hours, but it may take as long as 3 hours.