1. Alali, K., & Casali, J. G. (2011). Vehicle backup alarm localization (or not): Effects of passive and electronic hearing protectors, ambient noise level, and backup alarm spectral content. Noise and Health Journal, 13(51), 99–112.
2. ANSI (1974). Method for the Measurement of Real-Ear Protection of Hearing Protectors and Physical Attenuation of Earmuffs. Standard S3.19-1974. New York: American National Standards Institute, Inc.
3. ANSI (2007). Methods of Estimating Effective A-Weighted Sound Pressure Levels When Hearing Protectors are Worn. Standard S12.68-2007. New York: American National Standards Institute, Inc.
4. ANSI (2008). Methods for Measuring the Real-Ear Attenuation of Hearing Protectors. Standard S12.6-1997(R2008). New York: American National Standards Institute, Inc.
5. ANSI (2010). Methods for the Measurement of Insertion Loss of Hearing Protection Devices in Continuous or Impulsive Noise Using Microphone-In-Real-Ear or Acoustic Test Fixture Procedures. S12.42-1995(R2010). New York: American National Standards Institute, Inc.