Female mosquitoes (the one bitingmales do not bite) are not known to be repelled by any sounds.
In particular, commercial ‘mosquito repellents’ based on ultrasounds (i.e., above human hearing range, >20 kHz) have been shown to be ineffective in females of a number of species including genus of Anopheles, Aedes, Haemagogus and Verrallina (Schreck et al., 1984; Foster and Lutes, 1985; Jensen et al., 2000)
Schreck et al. (1984)'s abstract also adds that:
one of the [tested ultrasonic] devices gave off sound radiation which could be potentially harmful.