In the dark, mosquitoes use CO2 to find blood host like us. However, 1) they are known to have excellent auditory organs (ref1, ref2) and 2) sound can be heard from any directions, contrary to odors which follow the wind direction.
Do mosquitoes use our voice to find us?
Mosquitoes can hear the human voice. If they use human sound to hone in on us as a source of a blood feed is not known at this time, however research into this has just begun. This is especially useful research because of anthropophilic mosquitoes - human loving - which prefer human hosts, e.g. Anopheles species, which transmit diseases such as malaria, and some which use humans exclusively. If disease can be prevented by understanding the role of voice in attracting anthropophilic mosquitoes, it's well worth studying (even if only to develop mosquito traps.).
Until relatively recently, it was thought that a mosquito's acoustic abilities were very limited, and used mainly to detect the correct species and gender to mate with, as there are over 3000 species of mosquito (176+ in the US alone, the CDC states over 200), and they need to be able to determine which other mosquito would be a suitable mate. Most of the research honing in on their acoustic abilities has centered on males and their ability to detect females, e.g. in order to build traps to attract males to determine the efficacy of sterile male release into the wild, induce sterility in males, capturing and manipulating males genetically to introduce a dominant lethal gene, etc., hopefully limiting the population of those most deadly to humans without harming the environment. From this 2021 paper:
Early studies focused on mate-seeking male mosquito attraction to female wing-beats (Kahn and Offenhauser 1949), and female mosquito responses to male wing-beat frequencies in the laboratory and field (Ikeshoji 1981, Ikeshoji and Ogawa 1988). The fundamental wing-beat frequencies of male and female mosquitoes can vary by species (Table 2), so there has been interest in their use for surveillance and control efforts.
In the last 15 years, however, after studies emerged that some blood-feeding midges focused on host (or prey, if you prefer) vocalizations, some of that attention has turned to the acoustic capabilities of female mosquitoes. Multiple studies have shown that female mosquitoes known to feed on various species of frogs were attracted to traps using recordings of those frogs, and a few have shown the same in attraction of mosquitoes that feed on birds as hosts. Studies have shown that femaqle mosquitoes can detect sounds within the human vocal range at 10 meters away, and males even further (though male mosquitoes do not feed on blood.) But as of this year, no studies have been completed with regard to the response of female mosquitoes to human voive.
Mosquitos can certainly hear in the range of normal human speech. They are sensitive to the range of around 150-500Hz, and typical human speech is between 100-300Hz depending on your age and sex (DOI: 10.1016/j.cub.2019.01.026). Whether they use that auditory capability to zero in on humans, I do not know (and could find no indication that this is something known in the literature). I do know that the most important sense for mosquitos to find prey is olfaction.
The frequency sensitivity range surprised me actually. I was expecting the frequencies to be much higher. Some insects like moths are sensitive to ultrasound frequencies which helps them detect bats.
Based on the Göpfert et al. paper you listed, it appears that this hearing range tracks nicely with the sound frequency of mosquito flight. Without knowing really anything about the mosquito literature, I would hypothesize that this is no coincidence. I would guess they use hearing to determine the sex of other mosquitos (males and females produce different flight frequencies) for mating purposes. There is also evidence that their auditory abilities can help them in evasion from predators (DOI: 10.1038/s41598-021-81456-5).
