Like, I don't want to measure the decibel level around me. I want to know, for example, how strong the sound is coming from a device.
I heard that there are things like a jack special cable to limit the decibels, but what about a bluetooth device?
To be a little more clear; I read that sounds above the range of 80 decibels might damage the human hearing. I'm constantly using my headphones and I'd like to know if there is a way to check the decibel level of the sound coming out of my headphones so I can ensure that I'm not above the safe limit.