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A graph of the A-, B-, C- and D-weightings across the frequency range 10 Hz – 20 kHz Video illustrating A-weighting by analyzing a sine sweep (contains audio). A-weighting is a form of frequency weighting and the most commonly used of a family of curves defined in the International standard IEC 61672:2003 and various national standards relating to the measurement of sound pressure level. [1]
A commonly used weighting is the A-weighting curve, which results in units of dBA sound pressure level. Because the frequency response of human hearing varies with loudness, the A-weighting curve is correct only at a level of 40- phon and other curves known as B- , C- and D-weighting are also used, the latter being particularly intended for the ...
Typical American adult BRI values range from 3 or less (midsection leanness) to 7 or more (midsection roundness), with a medium index of about 5. [ 1 ] [ 3 ] As a relatively newer predictive metric, BRI has a smaller research record compared to long-established indices like the BMI and waist-to-hip ratio , so its accuracy and applications ...
Many cross- sectional studies have shown that, even within the normal BMI range, many adults have WHtR which is above 0.5. [ 34 ] [ 35 ] [ 26 ] Many children show the same phenomenon. [ 36 ] [ 37 ] Risk factors for metabolic diseases [ 35 ] [ 38 ] and mortality are raised in these subjects.
The corpulence index yields valid results even for very short and very tall persons, [7] which is a problem with BMI — for example, an ideal body weight for a person 152.4 cm tall (48 kg) will render BMI of 20.7 and CI of 13.6, while for a person 200 cm tall (99 kg), the BMI will be 24.8, very close to the "overweight" threshold of 25, while ...
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A weighting curve is a graph of a set of factors, that are used to 'weight' measured values of a variable according to their importance in relation to some outcome. An important example is frequency weighting in sound level measurement where a specific set of weighting curves known as A-, B-, C-, and D-weighting as defined in IEC 61672 [1] are used.
RFM for adult males: 64 – 20 × (height / waist circumference) RFM for adult females: 76 – 20 × (height / waist circumference) Although generally validated on a database of some 12,000 adults, RFM has not yet been evaluated in longitudinal studies of large populations to identify normal or abnormal RFM in relation to obesity-related health ...