How, if at all, does the noise of mosquito wings help their cause?

Actually, it’s only the female mosquitoes that bite. Usually, if there’s a mosquito buzzing around you, it’s a female looking for blood.

The sound of the buzzing helps their cause in a different way than making us crazy. The buzz noise comes from their wings flapping rapidly (which is why you hear many other flying insects “buzz” as well). Certain species of mosquito use this noise in mating. They can change the speed of the flapping to harmonize with one another. When they do harmonize ..it’s mating time. I believe I read somewhere that the males usually try to harmonize with the females – rather than vice versa.

The risk of death is worth the chance of reproducing.

Researchers have actually been trying to “play” with this sound to find ways to irradicate, or depopulate, certain species of mosquitoes (to help reduce the spread of certain diseases that these species can carry).

Maybe a sexual attraction thing?

The sound warns me, hard to be a Mosquito on the stealth.

This is a good year over here, considering all the late rains and the fact that I have a seasonal creek right below my deck across a little ravine. Also a water feature on my deck.
Very few Mosquitos…but, I also have an abundance of bats, tree frogs and lizards…the predators outnumber the prey.
Infact the big lizard hatch is over but the tree frogs are outta control, 100’s of minute little guys all over my yard, lawn, and sadly, a few dehydrated and shriveled dead ones that have gotten trapped in my house.

No need for bug spray over here, nature takes care of the mosquitos for me. :-D

I read somewhere that the sound of the buzzing is meant to attract a mate. It determines how fit the mosquito is and that it’s willing and able.