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Free-field correction values for RadioEar DD65v2 circumaural audiometric headphones
1Physikalisch-Technische Bundesanstalt, Braunschweig, Germany.
Free-field correction values for RadioEar DD65v2 audiometric headphones were determined. These values are crucial for accurate hearing assessments in audiology, ensuring reliable speech level measurements.
Area of Science:
- Audiology
- Acoustics
- Hearing Science
Background:
- Accurate hearing assessments require precise calibration of audiometric equipment.
- Free-field correction values are essential for adapting headphone measurements to real-world sound environments.
Purpose of the Study:
- To measure and provide frequency-dependent free-field correction values for the RadioEar DD65v2 audiometric headphones.
- To determine the free-field correction for speech levels using these headphones.
Main Methods:
- Measurements involved comparing headphone loudness levels to a plane progressive wave in a free sound field.
- Data was collected from 17 otologically normal participants.
Main Results:
- Frequency-dependent free-field correction values were calculated.
- The specific free-field correction for the speech level was found to be 3.2 dB.
Conclusions:
- Free-field correction values have been established for the RadioEar DD65v2 audiometric headphones.
- These values were determined with an expanded measurement uncertainty, providing a basis for improved audiological testing accuracy.
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