Complete silence is the best aid to getting work done. This is especially true for any type of creative work. The absence of any unexpected sound allows magic to happen.
The absence of unexpected sound.
Real life, at least in the modern world, doesn't allow for many silent times. It does allow for many nearly silent times. It will be quiet for a minute or two, and then a sudden noise will break your concentration. Maybe a car drives by out front. Perhaps it's laughter from down the hall. Or maybe someone asks you a question, because it seems as though you're not all that busy, after all.
Near silence is absolutely deafening.
With constant, random noise breaking your concentration, you aren't likely to get any good work done. You can't actually do anything about the random sounds, though. The only way to get past them is to drown them out.
Hit play on your favorite playlist and crank the volume up. Remember — silence is the best, but it's unexpected sounds that kill your concentration. You already know the words and sounds of your favorite music. Nothing in this playlist will be unexpected. Now get back to work, and enjoy your new silence.