doseBuster's USA Inc develops and markets the Exposure Smart Protector (ESP). The ESP integrates traditional occupational hearing protection with a personal noise monitor, enabling safety managers to measure and document the worker's actual noise exposure. Employers can use this information as part of their worker safety program, both to reinforce the need to wear hearing protection and to monitor individual noise exposures.. In September 2008 Sperian Protection announced the acquisition of doseBusters⢠USA, a pioneer in personal noise dosimetry technology