How to Get Cicadas to Shut Up: What Actually Works

Closing your windows is the single most effective thing most people can do to cut cicada noise indoors, and it works better than you might expect. Beyond that, the honest answer is that you cannot silence a cicada chorus outdoors. No pesticide, repellent, or device will quiet millions of insects whose entire adult existence revolves around making as much noise as possible. But there are practical steps that genuinely reduce the volume in your home and yard, along with a few research-backed approaches that may surprise you.

Why Cicadas Are So Incredibly Loud

Understanding how cicadas produce sound helps explain why they are so hard to shut up. Male cicadas have a pair of specialized organs called tymbals on either side of their abdomen. When tiny muscles contract, the tymbal membrane buckles inward, producing a clicking sound. When the muscles relax, the membrane snaps back into place thanks to the natural elasticity of its material. High-speed imaging shows that this buckling starts at one end of the tymbal and ripples to the other, then reverses in a rapid rebound sequence. Each cycle produces a click, and many cycles per second create the sustained buzzing or droning that defines a cicada chorus.¹

The tymbal alone does not fully explain why cicadas are so loud. The insect’s hollow abdomen acts as a resonant air cavity, amplifying certain frequencies while filtering out others. The tymbal generates vibrations across a wide range, from around 500 Hz up to 15 kHz, but the body cavity selectively boosts the frequencies that carry best through the environment. Researchers have compared this natural filtering to the behavior of engineered metamaterials designed specifically to manipulate sound waves.¹ Individual males of some species can exceed 90 decibels at close range, and when thousands or millions synchronize their calls in a mating chorus, the combined volume can rival a lawnmower or motorcycle. This is not a design flaw you can fix with a spray bottle.

The Best Indoor Strategy Is Simpler Than You Think

If the noise is driving you up the wall inside your home, your windows matter far more than anything you do outside. A study measuring outdoor-to-indoor sound reduction across a range of European buildings found that open windows reduced outside noise by only about 10 decibels. Tilting a window (the common tilt-and-turn style) improved that to roughly 16 decibels. Fully closing a standard window cut around 28 decibels of outside noise.² That 28-decibel drop is significant. Decibels work on a logarithmic scale, so a reduction of 10 dB sounds roughly half as loud to human ears. A 28 dB reduction means the cicada chorus that sounds like standing next to a running lawnmower outside would sound more like background conversation indoors with the windows shut.

The actual reduction you get depends on several factors. With windows closed, the most important variables are the material of the window frame, whether the window has intact gaskets or seals, and how many layers of glazing it has.² Older single-pane windows will let more sound through than modern double-glazed units. If you are living through a periodical cicada emergence and your house has drafty windows, even temporary measures like sealing gaps with weatherstripping tape or hanging heavy curtains can make a noticeable difference. Running air conditioning instead of opening windows for ventilation is the obvious trade-off during the few weeks of peak emergence.

White Noise and Earplugs for When Windows Aren’t Enough

Even with windows closed, the sound can penetrate enough to affect sleep, particularly if your bedroom faces a tree line where cicadas congregate. Research on environmental noise exposure at home has found that noise-induced annoyance and sleep disturbance are likely pathways linking chronic noise to poor mental health outcomes.³ Cicada noise is temporary and seasonal, so it does not carry the same long-term risks as living near a highway. But if you are sleeping badly for weeks during an emergence, the cumulative effect on mood and concentration is real.

White noise machines or fans can help mask the drone. Cicada calls are concentrated in a frequency band that overlaps well with broadband white noise, so a machine running at moderate volume can blend the two signals enough that your brain stops fixating on the cicada sound. Foam earplugs rated at NRR 32 or higher block roughly 20-30 dB when properly inserted, which combined with closed windows can bring the perceived cicada volume down to near silence. For outdoor activities, noise-canceling headphones or earbuds designed for commuting work surprisingly well against the steady, predictable frequency of cicada calls.

Why Insecticides Won’t Make Them Quieter

A common first instinct during a cicada emergence is to spray something. This does not work for noise reduction, and it causes collateral damage. The scale of a periodical cicada emergence is the core problem. Broods can number in the billions across a region, with densities reaching hundreds of thousands per acre in some areas. Killing the cicadas in your immediate yard does nothing meaningful to the chorus volume, because the sound carries from the surrounding landscape. You would need to eliminate every male within earshot, which is not feasible with any consumer product.

Broad-spectrum insecticides applied to trees will kill many other insects in the process, including pollinators and predators of actual garden pests. Research comparing chemical and physical control methods found that the neonicotinoid insecticide imidacloprid could reduce oviposition damage from periodical cicadas on young trees, but the study was focused on egg-laying injury to branches, not on noise. Netting alone was highly effective at protecting trees from that damage.⁴ Even in the context of tree protection, physical barriers outperformed chemicals. For noise? Neither approach silences the chorus, but at least netting does not poison your yard.

Netting and Physical Barriers Protect Trees, Not Your Ears

Wrapping young or vulnerable trees in mesh netting with openings smaller than about a centimeter is the gold standard for preventing cicada damage to nursery stock and newly planted trees. Netted trees in controlled studies sustained very little egg-laying injury compared to unprotected trees that were heavily damaged.⁴ This is worth doing if you planted a young fruit tree or ornamental in the past couple of years and a periodical brood is emerging in your area. Cicadas lay eggs in pencil-sized branches, and the splits they create can kill young limbs. Established trees generally tolerate the damage without issues.

But netting does not reduce noise. The males sitting in your neighbor’s oaks will still be calling. The value of netting is purely about protecting your investment in young plantings. If you are shopping at a garden center and someone tries to sell you a product marketed as a “cicada deterrent” for noise, be skeptical. The research supports physical exclusion for tree protection and very little else in terms of commercially available solutions.

Can Sound Be Used Against Them?

This is where the science gets interesting, if not yet practical for homeowners. Researchers have tested whether broadcasting certain acoustic signals can disrupt male cicada calling behavior. In experiments with grapevine cicadas, playing back sounds in the 0.5 to 10 kHz range interrupted male sexual signaling.⁵ The idea is straightforward: if male cicadas call to attract females, broadcasting competing or confusing signals can jam the communication system and cause males to stop singing.

This approach has been explored for agricultural pest management rather than backyard noise reduction. In vineyards or orchards where specific cicada species damage crops, targeted acoustic disruption could offer a pesticide-free control method. However, scaling this up to deal with a mass emergence of periodical cicadas in a residential neighborhood is a different problem entirely. The sheer density of calling males, the variety of species that may emerge together, and the volume they collectively produce would require enormous speaker arrays running continuously. No consumer product currently offers this, and the research remains experimental. It is an exciting proof of concept, though. The fact that you can shut individual males up with the right signal confirms that cicada calling is not just reflexive noise production but a behavior that can be interrupted.

The Noise Has a Built-In Expiration Date

Periodical cicadas are adults for only four to six weeks. Annual cicadas, which appear every summer in smaller numbers, sing for a somewhat longer season but typically call during the hottest parts of the afternoon and go quiet in the evening. Periodical emergences are intense but short-lived. If you are enduring a Brood emergence, the timeline generally looks like this: adults begin emerging in late spring, males start calling within a few days, the chorus peaks about two to three weeks in, and by six weeks the adults are dead or dying. The noise drops off before the last insects disappear because males stop calling once they have mated.

Knowing this timeline helps with planning. If you are considering postponing an outdoor event, shifting it by even two or three weeks can make a dramatic difference. The peak is genuinely awful in heavily forested areas, but the decline from peak to background is fast. Many people who have lived through multiple emergences say the noise was intolerable for about two weeks and then faded quickly.

Why Being Loud Is the Whole Point

Cicadas are loud because loudness is their survival strategy, which is part of why you cannot engineer a quiet emergence. The mass emergence itself is a form of predator satiation: there are simply too many cicadas for predators to eat them all. Birds are the major predators of adult periodical cicadas, and the sheer density of the emergence ensures that most individuals survive to mate. Red-winged blackbirds, for example, prey on periodical cicadas, but studies have shown that the loud noise males produce at mating centers does not itself deter bird predation.⁶ The defense is numbers, not volume.

What does deter predators is a specific escape behavior. Male cicadas that performed a “flysquawk” response when approached by blackbirds escaped almost every time. Only about 5% of blackbird attacks succeeded against males that used this startled flight-and-noise response. By contrast, every cicada that stayed motionless and silent when a bird approached was captured and eaten.⁶ So loud cicadas are, individually, better at surviving. Evolution has pushed the volume dial up hard, and the result is a species where silence means death.

A Fungus That Actually Does Silence Them (Sort Of)

Nature has produced one method for altering cicada behavior that is far stranger than anything humans have devised. A specialized fungal parasite called Massospora cicadina infects periodical cicadas and hijacks their sexual behavior in ways that would be unsettling in a horror film. In the early stage of infection, the fungus causes infected males to mimic the wing-flick responses that sexually receptive females use. Uninfected males, fooled by the signal, repeatedly attempt to mate with the diseased males, which spreads the fungal spores through close contact.⁷

Infected cicadas continue moving around and interacting with others even after their abdomens are largely replaced by a chalky mass of spores. Researchers describe Massospora as functioning at least partly as a sexually transmitted disease, with the behavioral manipulation serving the fungus’s reproductive interests rather than the host’s.⁷ This is not something you can deploy in your backyard, and nobody is suggesting it as pest control. But it illustrates that cicada behavior, including their calling patterns, is not fixed in stone. Biological agents can alter it profoundly. The fungus does not exactly silence the cicadas, but it rewires their communication in ways that reduce normal mating calls and replace them with something else entirely.

The Upside You Might Not Expect

Before you declare war on every cicada in your zip code, it is worth knowing that their emergence provides measurable benefits to the trees they visit. A three-year experiment with American sycamore trees found that cicada fertilization, from the massive deposits of dead adults and shed exoskeletons, strongly increased tree growth in the year of emergence. The size advantage persisted for at least two years afterward. The researchers did not detect any reduction in tree growth from the egg-laying damage cicadas caused. In fact, cicada activity on trees reduced the density of other aboveground herbivores and the damage those pests inflicted.⁸ The trees are, on balance, better off after an emergence than before it.

This means that the impulse to protect every tree with insecticide is often misguided for established plantings. The nutrient pulse from billions of decomposing cicadas is a significant ecological event, and the egg-laying damage that worries homeowners is typically cosmetic on mature trees. “Flagging,” where small branch tips turn brown and die after being split by ovipositing females, looks alarming but rarely threatens overall tree health. The net effect is essentially a free fertilizer application that your trees did not ask for but will happily absorb. If you can tolerate a few weeks of noise, your landscape comes out ahead.

Practical Steps Ranked by Effectiveness

If you want a straightforward plan for the next emergence, here is what actually helps, roughly in order of bang for your effort:

Close windows and run AC: This alone can cut perceived indoor noise by more than 75%, especially with modern double-glazed windows.
Seal gaps: Weatherstripping around old windows and doors reduces the flanking paths that let sound leak in.
Use white noise or fans: A broadband noise source masks the cicada frequency band effectively, especially for sleeping.
Wear hearing protection outdoors: Foam earplugs or noise-canceling headphones make yard work tolerable.
Net young trees: Mesh with small openings protects nursery stock and recently planted trees from egg-laying damage.
Adjust your schedule: Cicadas are loudest during warm afternoons. Morning and evening outdoor time will be quieter.
Wait: The entire adult phase lasts about four to six weeks for periodical species, with peak noise concentrated in the middle two weeks.

What does not help: spraying insecticides, setting out traps, blasting music at trees, or trying to scare them away with water. Cicadas are not mosquitoes. Their numbers are too vast for localized killing to make a dent in the sound, and they are not deterred by noise, water, or movement. The research on acoustic disruption is promising but not available as a consumer tool. For now, the battle is fought at the boundary of your home, not in the canopy.

1
PubMed Central. The tymbal of a cicada: nature’s sound-generating metastructure
2
PubMed Central. Differences between Outdoor and Indoor Sound Levels for Open, Tilted, and Closed Windows
3
PubMed Central. Mental health effects of exposure to environmental noise at home: A systematic review of potential mediating pathways
4
PubMed. Comparison of exclusion and imidacloprid for reduction of oviposition damage to young trees by periodical cicadas (Hemiptera: Cicadidae: Magicicada)
5
Entomologia Experimentalis et Applicata. Disruption of reproductive behavior of grapevine cicada, Cicadatra alhageos, by acoustic signals playback
6
PubMed. Red-winged blackbird predation on periodical cicadas (Cicadidae: Magicicada spp.): bird behavior and cicada responses
7
PubMed Central. A specialized fungal parasite (Massospora cicadina) hijacks the sexual signals of periodical cicadas (Hemiptera: Cicadidae: Magicicada)
8
PubMed Central. The effects of pulsed fertilization and chronic herbivory by periodical cicadas on tree growth