Mosquitoes have been buzzing -- and killing people -- since millenia. Buzzing back to them, may help toward the relief. Furthermore, buzzing is a valuable supplement, against some of the risks.
For example, shooting lasers in the open, could blind the people who might happen to be passing by. But if mosquitoes are invitable into a box, the job becomes a lot safer.
To have the mechanism to call mosquitoes, is necessary, and if they truly wait until starving, then it is sufficient, too. Killing quickly, is preferrable (for example, for mosquitoes not to run away, in case battery is not necessarily continuously with full charge), but that is optional (slam, or shoot).
Some of the progress (some, from more than a century ago), it seems, have been left idly sitting at library shelves, rather than contributing to a combo-relief, in the form of a wise mash-up.
People knew about the concepts of electromagnetism, frequencies, and the electromagnetic nature of sound, in the 19th century. Therefore, before exploring mosquitoes in the nature, with equipment for characterizing mosquito sounds, let's first look into what people had written, and reflecting from armchair, see how far would combining (& reconciling) those, help. Next, [again, @armchair], craft a few gadgets.
The literature might have been confusing -- because some sources contradict others. But, finding some consistent view[s], then testing to see what works, is not too hard.
The methods for provoking mosquitoes, are in three (or, four) categories, with different strengths. The good news is that, they are not mutually exclusive. Just, place the circuits sufficiently apart.
The provoking-then-killing systems, look promising for getting rid of the mosquito species. That is, self-defense by killing. But, not optimal if you were looking for a sure-fire shield, immediately.
That is because the circuit to kill the females, might not help stopping the female mosquitoes coming through a window (having had her male outside, now looking in to suck your blood). Likewise, circuits to kill the males, would not be stopping the females -- but when there is no male left, females might lose interest in sucking blood, because they suck blood after sex, before laying their eggs. (Maleless [virgin-]birth (parthogenesis) is (perhaps) a possibility. If so, then killing the males would help less.)
(( That is about provoking/rivaling mosquitoes, before they look out for blood. But alternatively, trapping the female mosquitoes, by making the trap look like victim, when mosquitoes look out for blood, is thinkable, too. Infrared is a characteristic of the victims. If that is suficient, that would be trivial, too. Other people have been producing chemical traps, which (similar to the case with frequencies) sometimes work, and sometimes (for other subspecies), found to be not working (thus, they are trying to tune their chemical traps to cover more mosquitoes, likewise). Chemical traps are less likely to be self-sustaining (unless, perhaps, condensing (CO2, etc.) from air, or attachable to plants for production). In contrast, if infrared would/will work, goes on. ))
In contrast, the circuits which repel mosquitoes, are presumably good for shielding at a given moment, and given place. But if you would walk away a bit (perhaps, to bathroom), they might mess with you. Likewise, they might mess with your family, children, when they are having sports activities, etc. Therefore, killing all of the mosquito species, is necessary, as a final, stable relief.
Mosquito subspecies have been emitting (& attend to) various frquencies -- some (like the yellow-fever mosquito) keeping [mostly] quiet (or, perhaps, in the infrasound or ultrasound range).
Various species turn out to have various flexibilities, which they might assume, when the conditions motivate -- which evolutionists try to sell as an example of "evolution" (but it is mock-"evolution", (very presumably) nothing about truly new species, at all). Naturally, that is a tool of the God, Allah, and sometimes looking like strategically operating -- within the two rules.
(1) The species boundary is well-kept (otherwise, it would allow "macro-evolution"ists make noise by pointing at a component which was never seen before. (2) The species might flexibly transform within the boundary of the species-flexibilities.)
Now that we know that, mosquitoes have huge flexibilities in the sound frequencies (some even quiet), the tool (genomic dynamism/flexibility) is a formiddable threat, swinging against our human species, and reminding us that, bio-"gods" are losers.
Just how mosquitoes had the flexibility to adapt against DDT (reportedly, some of the mosquitoes having that resilience beforehand), their frequencies might shift, too. Let's pray to Allah that, that sort of behavioral shifts will not happen. (Well, He might accept our wishes by either not allowing mosquitoes to adapt, or He might facilitate the strategies I/you might think, to keep killing the mosquitoes.) Naturally, we will have to track the possible changes. One hope I have is that, Allah might support us (as opposed to the evolutionist sloganeers "malaria somethings" such as Ayala, whose getting his Ph.D. (in 1960s) coincides with the failure of the war against malaria).
In other words, the theory I am subscribing to, is just the vice versa of Ayala, who likes to swear at the creatorship of the Creator. In contrast, the Creator seems to just act like written in the holy books (the Quran, and Torah/Bible), interacting with the World (rather than "left it running by itself"). In other words, He seems to be undermining the establishment of biology, which tries to undermine Him. That was the point of (why I thought) starting the fight against mosquitoes, through the DIY approach, rather than letting biologists (evolutionists, who swear at Him) test chances against the wrath of the God, Allah. In summary, although we might rub the noses of those losers in many strategic points, the true point is that, why we might have success, is that, we lack the respect to (especially unsuccessful) losers (evolutionary biologists) who just make names by making up unlikely theories (which demand neglecting the God, a priori).
Both Howard (1901), and Mitchell (1907) quote people who came by instances of mosquito (male) groups which come to contact with a specific-tone-producing tuning-fork or machine.
Mr. Weaver (who told about pounding mosquitoes, to Howard), was a U.S. engineer, who was just working with telegraphy, when he noticed the mosquito behavior, next patching a DIY tool, to kill the mosquitoes. Likewise, Mayer (who found the 512Hz for a species) seems to be not a biologist, at all, but expert in acoustics. Those give this DIY approach, extra hope -- especially while biologists are floundering (by the way, the working drug (Artemisin), is a herbal remedy, found in a 4th century Chinese book, not a bio-tech miracle). Let's pray to Allah, and proceed. Hopefully, by His permission, we will characterize (the critical frequencies, etc), then kill, all of the mosquito species -- all this, without selling our souls to His enemies.
Provoking mosquitoes, to a fly-paper (then, electrocuting) was found to work. Although electrocuting is (machine-wise) sustainable, you may have to notice two points. First, if this will work where people live, the concerns about bug-zappers (which explode the microbes on the bugs to the room), would apply. Therefore, you have to contain the explosion by closing some door, etc. Furthermore, they are only (harmful, but innocent) animals, and killing those without torturing, is preferrable ("reciprocity" not having applicability, because they have no volition, "except" instincts). Therefore, hopefully, the electrocution process takes less than their pain-perception (like if they perceive in milliseconds, but killable in microseconds, rather than slowly-burning). Unnecessarily torturous behavior (against innocent animals, although self-defense), might cause our getting less favor of Allah, in this fight. Thus, the concern fits the overall strategy, too. Not to allow their killing humans, we would kill, any way -- but while we have other methods, the electrocution (and lasers) will/would be less acceptable (or not acceptable), if torturous. Just slam, or freeze. Two non-burning sort of alternatives.
A hobby circuit was informative -- presuming that they were publishing the result of their experiences with the behavior of the circuit. But if the Cornell study is right about quoting the figure of 2KHz as the upper limit which mosquitoes would perceive, then the cause of the frequencies of the circuit working well (while sweeping the spectrum of 1KHz to 15KHz), might have been the intermittent-reinforcement the gaps were providing (or, perhaps, a broken instinct-loop, if not reinforcement). Perhaps, if the "optimal" tone would be routinely airing, the female mosquito would be getting away after some time, because nothing was happening. But when there is a gap, then the sound is coming again, she forgets that the same thing is happening again (and nothing will happen again), so she is waiting there, as if that were newly met sound.
By the way, if they truly fail to perceive beyond 2KHz, then turning the sound off for more than half the full "sweep," might work (test it). Less noisy, and less energy waste.
If running this circuit within the room, then some fancy music, to camouflage the constant (otherwise, presumably known as "boring") sound, would come valuable. That is, for both within the period of 1KHz-2Khz, as well as for the otherwise-would-be-quiet period, you might think of (relatively high-frequency) music, non-audible to mosquitoes. (Then again, perhaps they would not mind some human voices talking at the background, either. Therefore, fit into the remix (along with mosquito sounds), too.)
No need to contain human voices within the circuit (or, microcontroller). The utility of that is when the placement is in where humans are living, and therefore, your regular TV/radio/music set, would fit. Just turn both gadgets (mosquito-specific circuit, and your normal entertainment electronics) on.
If you would like to experiment with repelling the mosquitoes, two suggestions have been
In 1900, dragon flies as enemies of mosquitoes, was the concept of a book, which was listing a few essays written for a prize with that concept. They contain no suggestion about sound machines, but other people have been publishing circuits (dragon-fly sound, for repelling mosquitoes). One of the other sources reports that the dragonflies strategy was not fully successful to combat mosquitoes. To experiment, is free. If it would lessen the likelihood of mosquitoes coming at you, that is appreciable.
Ultrasound is not audible to humans, but pets might have trouble with it. This depends on the chosen frequency, presumably. In that case, you would choose those ultrasounds which do not disturb your dog, dolphin, bats, etc. Perhaps, a remix of a few of the ultrasounds, would sound acceptable to such animals, just how remixes of the otherwise boring audible constant tones, become relatively acceptable to humans.
Just experiment, if you would like to.
Maybe it should be unnecessary to express it, but do not keep the circuits for attracting mosquitoes, working together with the circuits for repelling mosquitoes. A gadget which was taken out of market bcause of an FTC ban, was mixig up (as its product literature states), dragon fly sounds, with (male) mosquito sounds. FTC found the gadget useless, upon trying.
The other problem, which I said above, is there, too. If the female which comes through the window, had mate, then she would not mind the male sound, but looking for blood.
For a video of demonstrating how a frequencies-only gadget (without slamming, nor laser-shooting) would work, I thought a prank. Not emitting the two sounds at the same time, but first inviting with a sound which invites mosquitoes, then turning that off, and immediately starting the dragon-fly sound. The mosquitoes would probably first come to that, but next run away in horror.
For optimal placement: (1) Mosquito-sound gadgets might most likely fit in relatively remote places (like corners of your garden, etc) because it is for killing the mosquito species rather than immediate shield (and it is with its constant sound/hum) -- although (as the 1984 hobby-circuit text was suggesting) if your room contains mosquitoes, then placing the loud (electronic circuit) "mosquito" at a corner of the room, makes sense (to get rid of the intruders which have been living within the house). (2) Victim-emulating gadgets might fit around the house, to short-circuit the female mosquitoes which search blood (before they find you). (3) The dragonfly sound gadget might be closest, because/if mosquitoes would not like to come close to that.
Relatively futuristic devices might make sense, too. But satisfactory surveillance is probably not applicable, yet. For perfect (immediate) shielding, you might think of sensor-based gadgets (rather than only the inviting-based gadgets) which scan all mosquito-shapes (or, mosquito genome, but genome-classifying tools have to speed up about tens of orders of magnitude (now, as of this writing, taking days or weeks to sequence genomes, and not remotely sampling, at all). That spots the incoming mosquitoes, and activates the contraption to kill those mosquitoes, right away. (To go with it, the gadgets which invite mosquitoes, will keep working out dutifully, in killing all of the mosquito species (but it might take time, more than a couple of minutes, that is.)
So, the strategy of promoting it as a game, makes even more sense. That was good for facilitating human involvement (for remote operations of in the war network, such as living in USA, but killing the mosquitoes in the villages of Africa), but furthermore, having fun with the process itself, is good for keeping it working. That is, think of the feedback of having found some mosquito corpses, thus verifying that the thing works, although some mosquitoes might still be buzzing around. (For pessimists, that might sound like your army fighting against guerillas, or a war stuck in trenches. But for the gamer sort (as well as hardcore mission types), there is a substance in killing the mosquitoes one by one, especially if by tuning/optimizing their gadgets with tactics for various contexts (some chance, some wisdom). If you would like to have some immediate statistics tool, for a frequencies-only (no slamming, no laser) killing gadget, then just place your provocateur circuit in a bowl, and count the mosquito corpses you find there.
If the circuit is remote, then for shooting a video, keep in mind to have the view of the camera not see other than the cup where the gadget is. To cast the light from above (perhaps, from a corner which is opposite to the camera), is all right, but seeing the outside of the cup through the camera, would cause privacy concerns -- especially if that is a unit that will be working at remote locations where people might walk around.