d9939aca_mory_Alpha__the_Star_Trek_Wiki__Sound
[Letter] D [Letter_2] Q [Sound_3] pronounced like q but choked, a very raspy sound, very forceful,very similar to the initial "cr" phoneme in croissant. [Sound] 
as in dead but with the tongue rolled further back; also like "nd" or "n" in some dialects
Klingonese - Memory Alpha, the Star Trek Wiki
Sound