The Prophet Muhammad said that Allah listens most attentively when the Quran is recited aloud in a pleasant and sweet sounding voice. A companion of Abu Haira clarified that this meant reciting the Quran aloud.

2.  N r at ed Abu H ai r a : Al l ah's Apost l e sai d,
ar ur
"Al l ah never l i st ens t o anyt hi ng as H l i st ens
e
t o t he Pr ophet r eci t i ng Q an i n a pl easant
ur
sweet soundi ng voi ce." A compani on of Abu
H ai r a sai d, "H m
ur e eans, r eci t i ng t he Q an
ur
al oud."
(Sahi h A - B
l ukhar i , Vol . 9, H t h
adi
574)