In quieter situations, 50 - to 70 - percent volume filled the room. (laptopmag.com)
However, that number is based on fifty percent volume level, so if you listen at higher levels (as many people do), expect significantly shorter battery life. (pcmag.com)
Specialty coffee has grabbed a 37 percent volume share of all cups consumed in the U.S., but with a 50 percent value share, according to 2012 figures from the Specialty Coffee Association. (cnbc.com)