"Ears do not cross hemispheres"
That's obviously wrong. Hearing, from both ears, is first processed by one of the parts of brainstem — mesencephalon (aka midbrain). On higher level it's processed by primary auditory cortex.
According to the 1832 book Six Months in America, volume II, at page 67:
At certain seasons of the year, their tramping and bellowing may be heard at a vast distance on the plains, by putting the ear to the ground; and in this way, if heard in the morning, incredible as it may appear, it will sometimes be evening before the hunters can come up with them.
From a letter to the editors of Hearing Journal:
The description of the Aftershokz bone-conduction earphones included the statement, “Because the headphones do not use the eardrums to transmit sound, they allow users to listen to music without risk of eardrum damage.” MP3 player earphones are not capable of producing levels great enough to cause an ...
Ringing after a concert is not a sign of permanent hearing loss, hence the recovery. However repeated exposure to the very high noise levels greatly increases your chances of causing permanent tinnitus and generally dulling your hearing. From the NHS guide to protecting hearing I have:
Experts agree that continued exposure to noise at or above 85dB over ...
As Garstecki notes, most headphones are capable of outputting up to 125dB1 of which prolonged exposure can result in hearing loss.
To get an idea, look at this sound comparison chart:
Sound level comparison:
City Traffic (inside car) 85dB
Train whistle at 500' 90dB
Truck Traffic 90dB
Ears cross hemispheres.
How you interpret the conversation, based on how well you hear it and which hemisphere is first to have contact it, may be affected.
There is currently research based on how people hold their cellphones based on left or right brain dominance: http://www.henryford.com/body.cfm?...
I took a "Physics of Sound" class when at college, and remember similar statements being made.
This page on the "Sensitivity of Human Ear" indicates that the threshold of hearing is 0 decibels. The threshold of pain is 130 decibels (1013 stronger signal) - or about the volume of a rock concert.
MakeItLouder.com has a chart saying that a mosquito buzzing 10 ...
Per cansa.org, preliminary reporting by IARC in October 2008 (based on data from the Nordic countries and part of the United Kingdom), showed a significant increased risk for glioma on the side of the head associated to cellphone use of 10 years or more. However, the final results of the Interphone study on 17 May 2010 showed that no relative risk for glioma ...