There has been a lot of arguments on this forum concerning what hearing protection and combinations should be used. And, every one knows an "expert" on this subject.
For those interested, here is a real scholarly article that while technical, is still mostly readable for most of us mere mortals. The fellow writing this is a world recognized Audiologist and expert in hearing protection and has a lot of technical articles and books to his credit. For more information, check out the References cited on the last page (found in any technical article).
https://pdfs.semanticscholar.org/f0bf/aab4d4f30887882c331ee8604c18c58b416a.pdf
For those interested, here is a real scholarly article that while technical, is still mostly readable for most of us mere mortals. The fellow writing this is a world recognized Audiologist and expert in hearing protection and has a lot of technical articles and books to his credit. For more information, check out the References cited on the last page (found in any technical article).
https://pdfs.semanticscholar.org/f0bf/aab4d4f30887882c331ee8604c18c58b416a.pdf
