Berger, Elliott H.; Voix, Jérémie. «Chapter 11: Hearing Protection Devices». A: D.K. Meinke, E.H. Berger, R. Neitzel, D.P. Driscoll, K. Bright. The Noise Manual (en anglès). 6th. Falls Church, Virginia: American Industrial Hygiene Association, 2018, p. 255–308.
Voix, Jérémie; Smith, Pegeen; Berger, Elliott H. «Chapter 12: Field Fit-Testing and Attenuation-Estimation Procedures». A: D.K. Meinke, E.H. Berger, R. Neitzel, D.P. Driscoll, K. Bright. The Noise Manual (en anglès). 6th. Falls Church, Virginia: American Industrial Hygiene Association, 2018, p. 309–329.
Barry L. Lempert & Richard G. Edwards «Field Investigations of Noise Reduction Afforded by Insert-Type Hearing Protectors». American Industrial Hygiene Association Journal. Taylor & Francis [Akron, Ohio], vol. 44, 12, 1983, pàg. 894–902. DOI: 10.1080/15298668391405913. ISSN: 1529-8663. PMID: 6660189.
Barry L. Lempert & Richard G. Edwards «Field Investigations of Noise Reduction Afforded by Insert-Type Hearing Protectors». American Industrial Hygiene Association Journal. Taylor & Francis [Akron, Ohio], vol. 44, 12, 1983, pàg. 894–902. DOI: 10.1080/15298668391405913. ISSN: 1529-8663. PMID: 6660189.
Barry L. Lempert & Richard G. Edwards «Field Investigations of Noise Reduction Afforded by Insert-Type Hearing Protectors». American Industrial Hygiene Association Journal. Taylor & Francis [Akron, Ohio], vol. 44, 12, 1983, pàg. 894–902. DOI: 10.1080/15298668391405913. ISSN: 1529-8663. PMID: 6660189.