A metal umlaut (also known as röck döts) is a diacritic that is sometimes used gratuitously or decoratively over letters in the names of hard rock or heavy metal bands—for example those of Blue Öyster Cult, Queensrÿche, Motörhead, The Accüsed and Mötley Crüe.
Among English speakers, the use of umlaut marks and other diacritics with a blackletter style typeface is a form of foreign branding intended to give a band's logo a Teutonic quality—denoting stereotypes of boldness and brutality presumably associated with Germanic and Nordic cultures. Its use has also been attributed to a desire for a "gothic horror" feel. The metal umlaut is not generally intended to affect the pronunciation of the band's name.
Speakers of languages which use an umlaut to designate a pronunciation change may understand the intended effect, but perceive the result differently. When Mötley Crüe visited Germany, singer Vince Neil said the band couldn't figure out why "the crowds were chanting, Mutley Cruh! Mutley Cruh!"
These decorative umlauts have been parodied in film and fiction; in the mockumentary film This Is Spın̈al Tap, fictional rocker David St. Hubbins (Michael McKean) says, "It's like a pair of eyes. You're looking at the umlaut, and it's looking at you."
The German word Umlaut roughly translates to changed sound or sound shift, as it is composed of um-, "around/changed", and Laut, "sound". In standard usage (outside heavy metal) the Germanic umlaut version of a vowel is pronounced differently from the normal vowel; the letters u and ü represent distinct sounds, as do o and ö as well as a and ä. The sounds represented by umlauted letters are typically front vowels (front rounded vowels in the case of ü and ö).