Free-field correction values for RadioEar DD65v2 circumaural audiometric headphones.

Objective: Free-field correction values were measured for RadioEar DD65v2 audiometric headphones.

Design: Free-field correction values, that is, the difference - between the free-field sensitivity level and the ear simulator sensitivity level , 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.