The album features guest appearances from Res, Jean Grae, UGK, Raheem DeVaughn, Roy Ayers, Kanye West, Norah Jones, Coi Mattison, Lyfe Jennings, will.i.am, Sa-Ra, KRS-One, Musiq Soulchild, Strong Arm Steady, Sizzla, Justin Timberlake and Marsha Ambrosius.

[2] Some than most reviews are average or mixed: Uncut gave it a score of three stars out of five and said, "Kweli, whose wordy rhymes can often read better than they flow, sounds nimble and at ease most of the time.

"[2] Hot Press gave it an above average review, however, and said, "Kweli's collaborative work has set the bar so high that his solo efforts routinely fail to meet these exalted expectations.

"[12] Metacritic, XXL gave it a score of XL (the equivalent of four out of five stars) and said, "Unlike 2004's The Beautiful Struggle, which clumsily juxtaposed grungy backpack beats with basic mainstream medleys, Eardrum is a more sonically cohesive endeavor.

[17] Los Angeles Times gave it a favorable review and said, "Kweli's commanding delivery and the well-executed songs on his sixth album... consistently provide pointed commentary... and masterful production".