Originally Posted by El Duderino /img/forum/go_quote.gif
Hi Shigzeo,
My apologies if you felt belittled but I was simply pointing out the misinformation in your posts. It is very true that you, of course, do not have to believe a word that I am saying.
You wanted some scientific rebuffs to your statements. Below is an abstract taken from PubMed--an online database of peer-reviewed medical literature that those of us who prefer scientific evidence rather than anecdotal nonsense often use as a resource. I read the full article using institutional access but cannot post it here due to copyright issues.
Nevertheless, the abstract, I believe, sufficiently proves, using scientific methodology, that your above quoted comment about "air" between the listener and the music source and the resulting ability to "feel" sound (suppressing a grin here) somehow translates to lower listening volumes than with an IEM.
Please read at your convenience. I have made a few comments afterwards to try and help make it more understandable if necessary.
"Preferred and minimum acceptable listening levels for musicians while using floor and in-ear monitors.Federman J, Ricketts T.
Vanderbilt University Medical Center, Department of Hearing and Speech Sciences, Medical Center East, South Tower, 1215-21st Avenue South, Room 8310, Nashville, TN 37232, USA.
PURPOSE: This study examined the impact that changing on-stage music and crowd noise levels during musical performance had on preferred listening levels (PLLs) and minimum acceptable listening levels (MALLs) across both floor and in-ear monitors. METHOD: Participants for this study were 23- to 48-year-old musicians, with and without hearing loss, who had 10 years of musical training or comparable professional experience. For this study, PLLs and MALLs were established for the musician's own voice, whereas the levels of other onstage musical signals were systematically varied. PLLs for in-ear monitors were found at significantly lower levels than for floor monitors (approximately 0.6 dB). RESULTS: PLLs for in-ear monitors were found at significantly lower levels than for floor monitors (approximately 0.6 dB). However, despite large spectral differences, PLLs across the 2 monitor types were small enough that the same recommended exposure time would be advocated based on National Institute for Occupational Safety and Health and Occupational Safety and Health Administration recommendations. MALL data also indicated significantly lower levels (approximately 6.0 dB) when musicians were using in-ear monitors in comparison to floor monitors. CONCLUSION: The much larger difference suggests that musicians' risk of noise exposure may be reduced by the use of in-ear monitors. However, given the similar PLL results and known monitor output levels, proper counseling would likely be required before this potential advantage would be realized."
So, here we have musicians using floor monitors which I hope satisfies your requirement for separation between listener and source by "air" vs. musicians in the same environment using IEMs rather than floor monitors. The preferred listening level and minimum acceptable listening levels were assessed in each group.
In a nutshell, musicians "turned the volume down" on IEMs relative to floor monitors by about 0.6 dB. Now this reduction in preferred listening level is not enough to change the recommended noise exposure time in IEMs vs. floor monitors due to the, admittedly, small reduction.
However, what is telling, and what people on this forum have been getting at is that safe IEM listening habits dictate using the minimum volume that is acceptable. You will see from the results that when using this parameter, musicians used significantly lower (by 6.0 dB!) listening levels when utilizing IEMs vs. floor monitors. This pretty much suggests that despite not being able to "feel" the sound (your words, not mine) with IEMs, listening levels are lower than in a situation where you are separated from the source by "air" (again, your words) and can presumably "feel" the sound.
Coupled with Febs informational link indicating that users of the ER6i IEM consistently listened at lower volumes, I feel your persisting argument that somehow the nature of an IEM makes us listen to it at higher volumes is moot.
I could, potentially, go all day with this and provide you with article after article dissecting each of your points but I think I may go see some otology patients instead. And, by the way, there is a significant difference between an otolaryngologist and our esteemed colleagues in audiology. Please take this post as informative and not hostile as it is not intended to be at all.
Regards,
El Duderino
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