Equivalent threshold sound pressure levels (ETSPLs) for RadioEar DD65v2 circumaural audiometric headphones.

Equivalent threshold sound pressure levels (ETSPLs) were determined for RadioEar DD65v2 audiometric headphones. The pure-tone hearing threshold levels were measured for 11 audiometric frequencies between 0.125 and 8 kHz, according to the conditions specified in ISO 389-9. ETSPLs are provided for an ear simulator according to IEC 60318-1, complemented by a comprehensive uncertainty budget. The study was based on 25 otologically normal test subjects. ETSPL values are provided with expanded measurement uncertainty. The data are compared for left/right ears as well as male/female test subjects. The results of both studies may be used to update ISO 389-8, the RETSPL standard for circumaural audiometric headphones.