== Claimed confusion == 

 Please list below any claimed confusions found in the literature. Quote literally; at least one sentence, at most one paragraph, per reference. Additionally, you may also want for offer a synthesis, however understand it may be disputed.    

 In the Chapman & Ellis article , multiple confusions are claimed, due to: multiple uses (different physical quantities expressed in same units); used frequently without stating a reference value (without which it is "useless"); different reference values used in air and water for same physical quantity; unclear what weighting applied (or not) to correct for human (or other) hearing.  Their conclusions include the statement: 

  
 Another references:  (to be detailed) 

 More references in  (to be detailed).