For diehard heavy metal fans, the music can be transcendent. Surrendering themselves to the onslaught of sound, tattooed and pierced men and women with dyed and, often, cascading hair, let their bodies take over, responding to the rhythm — thrashing, whipping, jumping — in whatever way feels right.

(Jacob Ehrbahn, powerHouse Books)

For his book Headbangers (powerHouse Books, 2015), Danish photographer Jacob Ehrbahn traveled to rock festivals around Europe, including Denmark's Copenhell, Germany's Wacken Open Air, and Sweden's Metaltown. But he left the musicians out of the frame, instead focusing on just one or two attendees. Shooting them close and from below, he captures their distorted faces against blue and grey skies.

The beautifully intimate portraits capture moments of uninhibited emotion — both serious and joyous — that would otherwise have been lost in the raucous crowd. Rock out to a selection of Ehrbahn's work below.

(Jacob Ehrbahn, powerHouse Books)

(Jacob Ehrbahn, powerHouse Books)

(Jacob Ehrbahn, powerHouse Books)

(Jacob Ehrbahn, powerHouse Books)

(Jacob Ehrbahn, powerHouse Books)

(Jacob Ehrbahn, powerHouse Books)

(Jacob Ehrbahn, powerHouse Books)

(Jacob Ehrbahn, powerHouse Books)

To purchase Headbangers or learn more, go to powerHouse Books.