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The EARLog series of technical monographs on hearing and hearing protection was created in 1979 to provide up-to-date research and educational information to the customers of what was then E·A·R Division to what is now today, 3M. Since that time twenty–one EARLogs have been published. They are available for download from this web site, and are also available as reprints (see below).

EARLogs are peer reviewed by independent experts prior to publication. This highly acclaimed series has appeared in eleven journals, is read in over 36 countries, and is utilized by the U.S. armed forces, OSHA, CAOHC, and more than 70 universities as educational materials for hearing conservation training courses. Moreover, it was heavily cited by the Mine Safety and Health Administration (MSHA) in their revised 1999 noise regulation. Selected EARLogs have been translated into Danish, German, French, Portuguese, and Swedish and others have been reprinted as contributed technical articles in magazines and journals in the U. S., Canada, Europe, Australia, and Brazil.

The EARLog Index provides an overview of the series on its back page, with initial publication dates and the languages into which selected EARLogs have been translated. The body of the index provides a key word index for the entire series.

There have been strides in understanding hearing protection function and performance in the twenty–one years since the first EARLog was published. This evolving series has reflected that fact by incorporating the most current information available at the time of publication. Certain of the EARLogs (1, 2, 15, and 16) contain information that has been supplanted or has become dated. Those EARLogs are not available for download; however, copies may be obtained by contacting Cyd Kladden and specifying the nature of your request.

EARLogs are provided as a courtesy and may be reproduced only in their entirety and with clear copyright reference to 3M. If you plan to use any of this information in a publication, please contact Cyd Kladden for permission.


EARLog Series – Complete series including EARLog Index, less special request EARLogs (1, 2, 15, and 16). (1.8Mb WinZip File)

Overview and Index to the EARLog Series Numbers 1-21 (215k)
EARLog 1 - The Threshold Shift Method of Measuring Hearing Protection Attenuation (Special Request Only)*
EARLog 2 - Single Number Measure of Hearing Protector Noise Reduction (Special Request Only)*
EARLog 3 - The Effects of Hearing Protectors on Auditory Communications (52k)
EARLog 4 - The Performance of Hearing Protectors in Industrial Noise Environments (76k)
EARLog 5 - Hearing Protector Performance: How They Work - and - What Goes Wrong in the Real World (284k)
EARLog 6 - Extra-Auditory Benefits of a Hearing Conservation Program (42k)
EARLog 7- Motivating Employees to Wear Hearing Protective Devices (65k)
EARLog 8 - Responses to Questions and Complaints Regarding Hearing and Hearing Protection (Part I) (39k)
EARLog 9 - Responses to Questions and Complaints Regarding Hearing and Hearing Protection (Part II) (36k)
EARLog 10 - Responses to Questions and Complaints Regarding Hearing and Hearing Protection -Part III (36k)
EARLog 11 - The Hearing Conservation Amendment-Part I (53k)
EARLog 12 - The Hearing Conservation Amendment-Part II (117k)
EARLog 13 - Attenuation of Earplugs Worn in Combination with Earmuffs (69k)
EARLog 14 - Protection for Infrasonic and Ultrasonic Noise Exposure (69k)
EARLog 15 - Workers' Compensation for Occupational Hearing Loss (Special Request Only)*
EARLog 16 - A New Hearing Protection Attenuation Standard - ANSI S12.6 (Special Request Only)*
EARLog 17 - Ear Infection and the Use of Hearing Protection (79k)
EARLog 18 - Can Hearing Aids Provide Hearing Protection? (76k)
EARLog 19 - Tips for Fitting Hearing Protectors (110k)
EARLog 20 - The Naked Truth About NRRs (58k)
EARLog 21 - Hearing Protector Testing-Let's Get Real (544k)
 

 

 

*Special Request Only - To request a "special request only" EARLog contact Cyd Kladden.
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