Death metal, in particular, is associated with growled vocals; it tends to be lyrically and thematically darker and more morbid than other forms of metal, and features vocals which attempt to evoke chaos, death, and misery by being "usually very deep, guttural, and unintelligible".
Death metal, particularly, is linked to grunted vocals; it tends to be lyrically and thematically darker and more macabre than other forms of metal, and features vocals that aim to evoke turmoil, demise, and despondency by being "usually very low-pitched, guttural, and indistinguishable".