Static power pulse
From Tardis Wiki, the free Doctor Who reference
According to the Eleventh Doctor, a static power pulse was as "characteristic as an audio signature" to the Daleks. Amy Pond likened it to a giant heartbeat. (COMIC: The Only Good Dalek)
It's the sound that means death and destruction... the sound that means death and fear... the sound that means the Daleks are coming.
The distinctive sound was heard within most Dalek bases, including the Dalek City on Skaro, (TV: The Daleks) and Dalek spaceships, (TV: Victory of the Daleks) including the Dalek Flagship. (TV: Bad Wolf/The Parting of the Ways)
