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Reference equivalent threshold sound pressure levels for Apple EarPods.

Cheng-Yu Ho1, Pei-Chun Li2, Shuenn-Tsong Young3

  • 1Holistic Education Center, Mackay Medical College, No. 46, Section 3, Zhongzheng Road, Sanzhi District, New Taipei City 25245, Taiwan swellfishyu@gmail.com.

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This summary is machine-generated.

This study measured the reference equivalent threshold sound pressure levels (RETSPLs) for Apple EarPods, establishing crucial calibration data for audiometric equipment. The findings confirm reliable measurements for these widely used headphones.

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Area of Science:

  • Audiology
  • Bioacoustics
  • Hearing Science

Background:

  • Reference Equivalent Threshold Sound Pressure Levels (RETSPLs) are essential for calibrating audiometric equipment to a zero hearing threshold.
  • Accurate RETSPLs are critical for reliable hearing assessments across various frequencies.
  • To date, RETSPLs for Apple EarPods (MB770G) have not been published.

Purpose of the Study:

  • To measure and report the RETSPLs for Apple EarPods (MB770G).
  • To evaluate the test-retest reliability of these measurements.

Main Methods:

  • Hearing thresholds were measured in 36 normal-hearing participants (72 ears) across six frequencies (250–8000 Hz).
  • Measurements were repeated twice for 33 participants (66 ears) to assess reliability.
  • Statistical analysis included Pearson's correlation and Wilcoxon signed-rank tests.

Main Results:

  • This study successfully provides the RETSPLs for Apple EarPods.
  • Significant Pearson's correlations (p < 0.001) were observed, indicating strong reliability.
  • No significant differences were found using the Wilcoxon signed-rank test (p > 0.01), further confirming test reliability.

Conclusions:

  • The measured RETSPLs for Apple EarPods offer valuable calibration data for audiometric testing.
  • The study demonstrates high test-retest reliability for Apple EarPod RETSPL measurements.
  • These findings support the use of Apple EarPods in audiological assessments requiring precise calibration.