SoundDogs, Sirens - Tanker Classic Emergency Siren - MCU - Siren Blast Thirteen Times, Sounds Similar To Old Model A Car Horns, But Lower & Louder, Aah Oooooh Gaaaag

This sound effect can be found on Soundstorm Sound Effects Library, which was made by SoundDogs. It was originally an United Artists sound effect that debuted in Run Silent Run Deep (1958). It is mostly known for being used as an ahooga horn in the British/Spanish children's CGI television series, Pocoyo, in seasons 1-2 when the characters get surprised, shocked or scared. Also, it is almost similar to Sound Ideas, HORN, KLAXON - SUBMARINE KLAXON: SEVERAL 01 from the 20th Century Fox Sound Effects Library.

Clean, Full Length and Unedited Link to the Sound Effect[]

The Cat in the Hat Knows a Lot About That! (Heard once in "Digging the Deep" when the alarm starts wailing after the Cat presses the button.)
Courage The Cowardly Dog (Heard once in "Mission to the Sun", along with Sound Ideas, ALARM - BATTLE STATIONS: LOUD ELECTRONIC ALARM, SCI FI 01.)
Doctor Who (Heard once in "The Claw of Axos".)
Pet Alien
Pocoyo (Used commonly as an ahooga horn in seasons 1-2 when the characters get surprised, shocked or scared.)
Skunk Fu! (Heard once in "The Art of Dim Sum Fu".)
Special Agent Oso (Heard once in "Connect Another Dot" and "Costume of Solace".)
Superman: The Animated Series (Heard 6 times in "The Prometheon".)