The allowed maximum exposure time is calculated by using an exchange rate, also called a dose-trading relation or trading ratio.. The exchange rate is the amount by which the permitted sound level may increase if the exposure time is halved.
body mass index (BMI) the weight in kilograms divided by the square of the height in meters, a measure of body fat that gives an indication of nutritional status.cardiac index cardiac output corrected for body size.n adults, a BMI greater than 30 kg/m 2 indicates obesity; a BMI greater than 40 kg/m 2 indicates morbid obesity; and a BMI less than 18.5 kg/m 2 indicates a person is underweight. The lowest overall death rate is found in people with a BMI of 20 to 24.9 kg/m 2. See also: index.
As it applies to weight loss surgery, the disease is morbid obesity and the comorbidities are many. Morbid Obesity is a condition when you are severely overweight. Body Mass Index (BMI) is a calculation that uses your height and weight to create a standard measure of obesity.