They can crow and the girls do sing an "egg song" when they lay an egg in the afternoon/ early evening (at least some of mine do this). However, this is not overly loud nor often. I find that once a group (1 male with 4-5+ females) settles into their routine, they are actually pretty quiet. Add more males, and you will get more noise (a lot more noise) and fighting. If you add more quail, but in separate cages of 1 male with his group of girls, you might get a little extra noise with a little extra crowing, but it is not too bad. Of course, they do have their personalities so you might end up with a quieter or louder male.
As others noted, you do not need a male unless you will incubate and hatch. If you want a constant supply of eggs, you might want to have a male so you can incubate every 4-8 months and have new quail ready to lay when the older ones are becoming a little less productive.
Good Luck.