Jolene is a system for measuring the sound levels of personal stereo systems. She is part of the Dangerous Decibels education and research projects. Jolene was constructed using a used fashion mannequin and a sound level meter wired to a silicon ear. Jolene makes appearances at schools and universities, scientific meetings, health fairs, and many other public events. She always attracts a crowd and is helpful for promoting noise-induced hearing loss and tinnitus prevention. Jolene has also been used as a research tool to study the beliefs and listening practices regarding personal stereo systems.