Digital Audio Analyzers
As regards the activity carried out by those in the call center it is important to note that much of the noise under which a trader is directly applied to the outer ear (acoustic signal from the headphone) and not, as usually happens, is only widespread environmental noise . For this reason they are different measurement methodologies normalized been identified that provide for a correction of the measured noise spectrum waves bring the same extent equivalent to the diffuse sound field in the vicinity of the attache head.
The measurement techniques normalized are two: the first requires the measuring the acoustic signal with a probe placed in the operator''s ear canal (MIRE technique) but attention difficult to enforce; the second requires the measurement of an acoustic signal to the eardrum equivalent to that to which the operator is subject by the use of a system similar to those used in headphones, powered by an equivalent electrical signal and applied to a normalized anthropometric mannequin.