What is a safe level to work for hours ?

I have a dB meter on my iPhone, and it starts to get red at 75 dB, which isn't very loud in my opinion. I'd rather work at around 80 dB.

edit: I realized after posting this that the impression of loudness really depends on the frequency content of the material

What is the sound level you work at ?

edit: I guess I simply had to google that. This chart represents the exposure maximum times after which permanent damage can occur (a +3 dB increment doubles the sound pressure, so +5 dB almost quadruples it)



http://ift.tt/2dwiN6B

"The average person can hear sounds down to about 0 dB, the level of rustling leaves. Some people with very good hearing can hear sounds down to -15 dB. If a sound reaches 85 dB or stronger, it can cause permanent damage to your hearing. The amount of time you listen to a sound affects how much damage it will cause. The quieter the sound, the longer you can listen to it safely. If the sound is very quiet, it will not cause damage even if you listen to it for a very long time; however, exposure to some common sounds can cause permanent damage. With extended exposure, noises that reach a decibel level of 85 can cause permanent damage to the hair cells in the inner ear, leading to hearing loss."

http://ift.tt/2dwjYCP

What is a safe level to work for hours ?