What happens when boys go through puberty? Among other things, they experience a sudden increase in their testosterone levels, causing an increase in bone density, lean muscle tissue, and a thickening of the vocal cords. You remember hearing your voice crack as it was changing? Do you remember that 12-24 month period where you gained about 25+ pounds, were eating your parents out of house and home, and grew 6+ inches?
Do you hear women who've taken significant amounts of compounds that cause virulization? (sp?) The compounds that affect the development of male characteristics have a high androgen component. Most compounds have an anabolic component and an androgenic component. Dbol is more anabolic than androgenic, but all compounds can affect you androgenically depending on the dose and duration. Look up the profile of Dbol and see what the anabolic and androgenic rating is of the compound, and that may give you some idea of how it will affect voice. On top of that, if you're an adult male, your vocal chords have already thickened, and differences are not too noticeable, if you're a female, any change is more noticeable, and if you're a young man in your teens, please, please, please do not consider taking any compounds that might interfere with your natural development.