Hearing Protection Research

In-Ear Microphone

XL Audiometric Earmuff Testing Headphones

Kurtosis Loss analysis

An analysis of the reduction in kurtosis level (impulsiveness) of sound through earplugs. Kurtosis has significance for hearing damage, speech intelligibility, and musical timbre.

Takeaways: Spectral insertion loss is independent of the kurtosis of the noise exposure! Kurtosis loss (kurtosis exposure reduction) is independent of spectral insertion loss. Kurtosis loss for HPDs should be incorporated into testing standards, especially regarding complex noise exposures (such as music)!

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