Assuming you meant literally, not just figuratively drown out the world, I went with some personal favorites for when I need to just make everything fade into the background.
(I prefer the cover of Threshold by Sex Bomb-omb over the Beck version)
01. Sex Bomb-omb - “Threshold” (Scott Pilgrim Soundtrack)
02. Zebrahead - “Rescue Me” (MFZB)
03. Family Force 5 - “Supersonic” (Business Up Front/Party in the Back)
04. Billy Talent - “Red Flag” (Billy Talent II)
05. The Roots - “How I Got Over” (How I Got Over)
06. Of Montreal - “Wraith Pinned to The Mist and Other Games” (The Sunlandic Twins)
07. Caravan Palace - “Suzy” (Caravan Palace)