* "Kwa sauti kubwa" - This is the most common and literal translation, meaning "with a loud voice." It's used in general situations.
* "Sauti kubwa" - This is a shorter version of the previous phrase, simply meaning "loud voice." It's also commonly used.
* "Zaidi" - This means "more" and can be used to indicate a higher volume in certain situations. For example, you could say "Zaidi kidogo" ("A little more") if you want someone to speak slightly louder.
* "Fanya sauti" - This literally means "make noise" and is used to tell someone to speak louder.
The best option for you will depend on the specific context and the tone you want to convey.