“There are many studies that show that workers work better with background music.”
There is a Gemara about that towards the end of Sotah 48a.
From Soncino:
“R. Huna said: The singing of sailors and ploughmen is permitted, but that of weavers is prohibited.(37)”
“(37) Singing helps the former in their work, but with the latter it is done out of frivolity.”