>Berger, Elliott H.; Voix, Jérémie (2018). «Chapter 11: Hearing Protection Devices». I D.K. Meinke. The Noise Manual(engelsk) (6th utg.). Falls Church, Virginia: American Industrial Hygiene Association. s. 255–308. Besøkt 8. februar 2023.
Voix, Jérémie; Smith, Pegeen; Berger, Elliott H. (2018). «Chapter 12: Field Fit-Testing and Attenuation-Estimation Procedures». I D.K. Meinke. The Noise Manual(engelsk) (6th utg.). Falls Church, Virginia: American Industrial Hygiene Association. s. 309–329. Besøkt 8. februar 2023.
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Elliott H. Berger et. al (2018). ANSI/ASA S12.71-2018. Performance Criteria for Systems that Estimate the Attenuation of Passive Hearing Protectors for Individual Users(engelsk). Melville, New York: American National Standard Institute. s. 54.link
Barry L. Lempert & Richard G. Edwards (1983). «Field Investigations of Noise Reduction Afforded by Insert-Type Hearing Protectors». American Industrial Hygiene Association Journal. Akron, Ohio: Taylor & Francis. 44 (12): 894–902. PMID6660189. doi:10.1080/15298668391405913.
Technical Committee CEN/TC 159 “Hearing protectors” (17. november 2021). EN 17479-2021. Hearing protectors - Guidance on selection of individual fit testing methods(engelsk). Brussels: European Committee for Standardization. s. 46. ISBN978 0 539 04746 2.link
Barry L. Lempert & Richard G. Edwards (1983). «Field Investigations of Noise Reduction Afforded by Insert-Type Hearing Protectors». American Industrial Hygiene Association Journal. Akron, Ohio: Taylor & Francis. 44 (12): 894–902. PMID6660189. doi:10.1080/15298668391405913.