I am curious as to how loud my music is when listening to my headphones on my iPod and computer. Is there a device that would allow me to measure it, relativity accurately. I also monitor sound/ DJ at some events and would like to be able to monitor the sound levels I am at because right now I have no idea. So if there is a device that I could use for both that would be cool. I am not looking for anything expensive because I wont use it that often and am more curious than anything. Do you have any good recommendations? I have no idea what type of thing would do this and how much they cost. I most likely wouldn't spend over $30 but the cheaper the better (but I don't want something that is so cheap that it is not worth getting).
I know this isn't a headphone AMP, but I figured this is the closest thing, and I would imagine people using amps know enough about sound to help.