some people speaking bad German say unt instead of und when speaking.
Actually, this is not bad German at all.
If you remember lectures on High German consonant shift that was complete around 6 to 7th century AD. You will also remember that many of the consonant changes had to do with voiceless shifts in High German (Hoch Deutsch). Of course, you will also know that Hoch Deutsch is is what influenced modern German to a degree higher than other German dialects. If you happen to have forgotten all those then a decent refresher course can be found on the friendly Wikipedia: en.wikipedia.org/wiki/High_German_consonant_shift
For instance:
Hunde /hun
de/ but Hund /hun
t/ (dog, in German it can also be Spelled Hun
t)
rauben /rau
ben/ but Raub /rau
p/ (rob, robbery)
Könige /køːni
ɡə/ but König /køːni
ç/ (king)
Particularly the last example is striking (that's gotta be the sexiest sound in all of the German language). You can hardly get any more voiceless than that, although in some dialects (such as some areas of Berlin) and depending on the preceding vowel (t
ag vs. Pfenn
ig) often sounds different, but in most cases still voicelss.