If your ceiling has a pitch to it already..the sonic impact would be limited to the added bounce from the glass. If you have a flat ceiling, the hole down from the skylight would create a waveguide with a reflective surface at the top....and the impact on sonics would be more of an unknown.
From a light/heat gain standpoint, the morning Sun is friendly and the afternoon Sun is less so. ie: solar gain to warm up a room in the A.M. is usually a good thing...esp. if you live in the upper part of the U.S.,..however, P.M. Sun and the solar gain from (ie: South and West facing windows/skylights) are usually a problem in this hemisphere and are a common building error by both builders and Architects.
From a light/heat gain standpoint, the morning Sun is friendly and the afternoon Sun is less so. ie: solar gain to warm up a room in the A.M. is usually a good thing...esp. if you live in the upper part of the U.S.,..however, P.M. Sun and the solar gain from (ie: South and West facing windows/skylights) are usually a problem in this hemisphere and are a common building error by both builders and Architects.