The Bat-Signal is a distress signal device appearing in American comic books published by DC Comics, as a means to summon the superhero, Batman. It is...

See media help. A bat detector is a device used to detect the presence of bats by converting their echolocation ultrasound signals, as they are emitted...

means. Bat-Signal When Batman is needed, the Gotham City police activate a searchlight with a bat-shaped insignia over the lens called the Bat-Signal, which...

those committed by supervillains. Generally it is Gordon who uses the Bat-signal to summon Batman, and it has become a running joke of sorts that Batman...

produce signals to jam bat echolocation. Many moth species have a hearing organ called a tympanum, which responds to an incoming bat signal by causing the moth's...

Angeles projected the Bat-Signal on City Hall as a tribute to West, and in his hometown of Walla Walla, Washington, the Bat-Signal was shone upon the landmark...

convert the new telescope into a giant freeze ray, while Ivy uses the Bat-Signal to contact Robin. Robin attempts to go after Ivy alone, but Batman convinces...

unveils the Bat-Signal. Batman leaves the police a note, promising to defend Gotham should crime strike again, and asking them to use the Bat-Signal to summon...

is left to Alfred. Gordon finds the Bat Signal repaired, while Lucius Fox discovers that Bruce had fixed the Bat's malfunctioning auto-pilot. In Florence...

these displays are the "Bat-Wave" warning signals, an alternate way of calling upon the Caped Crusader before the Bat-Signal went into service. As a throwback...