The Ruling on Reciting Aloud by the Single Worshipper
Question :
Is it permissible for one who is praying alone to recite aloud in the audible prayers?
Answer:
It is lawful for him to do so, just as it is prescribed for the Imam to do so, and it is a Sunnah. But he should not raise his voice in a manner which will annoy the worshippers, those making remembrance, or those sleeping who are near to him, according to Hadiths narrated in this regard.
Source:
Ibn Baz
Fatawa Islamiyah, Vol. 2 Page 168