In the dark, mosquitoes use CO2 to find blood host like us. However, 1) they are known to have an excellent auditory organs (see references belowref1, ref2) ) and 2) sound can be heard from any direction, contrary to odors which follow the wind direction.
Do mosquitoes use our voice to find us?
Göpfert, M.C. and Robert, D., 2000. Nanometre-range acoustic sensitivity in male and female mosquitoes. Proceedings of the Royal Society of London. Series B: Biological Sciences 267(1442): 453-457. https://doi.org/10.1098/rspb.2000.1021
Feugère, L., Roux, O., Gibson, G., 2022. Behavioural analysis of swarming mosquitoes reveals higher hearing sensitivity than previously measured with electrophysiology methods . J Exp Biol 2022; jeb.243535. doi: https://doi.org/10.1242/jeb.243535