Muffler (silver) and exhaust pipe on a Ducati 695 motorcycle. A muffler (silencer in English) is a device for reducing the amount of noise emitted by the exhaust of an internal combustion engine.
Quick Answer. Normal blood sugar levels should be  less than 100 mg/dL when fasting and less than 140 mg/dL two hours after eating, according to WebMD. People without diabetes tend to have blood sugar levels of around 60 to 90 mg/dL before eating.
You may want to read about blood glucose monitors. Normal Glucose Range ... For a person without diabetes, the normal glucose levels should be in the range of 70 to 120 mg/dl. According to American Diabetes Association, the normal glucose range for diabetics should always be less than 154 mg/dl.The normal glucose range for children before breakfast should be in the range 70 to 99 mg/dl.Two to four hours after a meal, the normal glucose range should be between 70 to 139 mg/dl.ou may want to read about blood glucose monitors. Normal Glucose Range ... For a person without diabetes, the normal glucose levels should be in the range of 70 to 120 mg/dl. According to American Diabetes Association, the normal glucose range for diabetics should always be less than 154 mg/dl.