At your risk, this is not an expert or medical advice.
Use common sense.
Do not expose yourself to high sound presure levels.
Never experiment with headphones, speaker systems that may emmit high sound presure level, speakers that are close to the ear etc.
Even lower sound presure levels may be harmful for a longer time of exposure.
Rest your ears.
Rest yourself and your brain.
Ears are more precious than the most expensive microphones in the world all together or the best or lowest noise front end amplifiers all together.
Hearing protection must be used.
The human ear is possibly one of the most sensitive if not the most sensitive instrument in the universe. It can hear the equivalent light power of a 100W light bulb on the moon arriving on earth.
[if memory is correct this has been read in the book of S.S. Stevens, founder of the Harvard university psychophysics laboratory]
Further reading:
Sound and Hearing - S.S. Stevens, F. Warshofsky - Time-Life science series
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