Source: The Great Interpretation of Dreams (Ibn Sirin)
A beautiful voice in a dream indicates good tidings, joy, and exaltation. An ugly voice indicates worry, grief, and bad news.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
A voice indicates reputation and mention. A loud voice indicates strength and victory.
Source: Signs in the Science of Expressions (Ibn Shaheen)
A voice is interpreted as news. If good, it is good news; if ugly, it is bad news.