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Free-field correction values for RadioEar DD65v2 circumaural audiometric headphones
1Physikalisch-Technische Bundesanstalt, Braunschweig, Germany.
Objective:
Free-field correction values were measured for RadioEar DD65v2 audiometric headphones.
Design:
Free-field correction values, that is, the difference GF-GC between the free-field sensitivity level GF and the ear simulator sensitivity level GC, were determined by loudness level comparisons between the headphone and a plane progressive wave in a free sound field.
Study Sample:
The study was based on 17 otologically normal test subjects.
Results:
Frequency-dependent free-field correction values are provided. The free-field correction of the speech level was determined to be 3.2 dB.
Conclusions:
Free-field correction values were determined for RadioEar DD65v2 audiometric headphones with an expanded measurement uncertainty.
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