Preliminary Investigation of Perceived Sound Quality for High-Fidelity Premolded Hearing Protection Devices.

High-fidelity premolded earplugs (HiFi HPDs) are designed to provide relatively uniform attenuation across frequencies. The primary goal of this study was an exploratory analysis of relationships between attenuation and perceptions of sound quality. Participants were 16 adults tested using commercial HiFi HPDs marketed for use at recreational music events.

Verification of Attenuation for Premolded Hearing Protection Devices Designed for Music.

High-fidelity premolded earplugs (HiFi HPDs) are designed to provide relatively uniform attenuation across frequencies. The primary goal of this study was to verify the amount and flatness of individual user attenuation. HiFi HPD attenuation was measured using real-ear attenuation at threshold (REAT) measurements under circumaural earphones.