New methods are available to assist in evaluating the risk of impulse noise-induced hearing loss from inflatable devices@ for example@ airbags and seat belt pretensioners. This document presents some background on impulse noise measurement techniques and assessment criteria. Related information relative to test details@ for example@ preamplifier specifications and filtering methods and criteria@ will be discussed in a future recommended practice. Purpose This document serves to disseminate information about these tools and techniques to assist the automotive restraint development process.