The leaf blower’s larger, slower, continuously operating cousin.

The cardiovascular evidence

A 2024 study in the Journal of the American College of Cardiology found that higher aircraft noise exposure is directly linked to worse heart structure and function in residents living under flight paths. The change is measurable on imaging — actual structural cardiac deterioration as a function of cumulative exposure.

A PMC cardiovascular review lays out the full damage cascade from flight-path noise:

• Increased insomnia
• Sleep disorder prevalence
• Elevated stress hormones (cortisol, catecholamines)
• Oxidative stress
• Endothelial dysfunction (blood-vessel lining damage)
• Arterial stiffness (precursor to hypertension and cardiovascular disease)

The American College of Cardiology issued a statement in 2025 calling for concerted government and industry action specifically because millions of people living under flight paths are taking measurable cardiac damage. That is a major medical society, in a public statement, naming flight-path noise as a population-scale cardiovascular hazard.

Why aircraft noise is especially insidious

Aircraft produce significant low-frequency content and infrasound — frequencies below the threshold of conscious hearing. A 2026 Frontiers in Behavioral Neuroscience paper found that infrasound exposure elevated cortisol and produced more negative affect in subjects even when they could not consciously detect or identify the sound.

This is the same mechanism that makes pulsed industrial noise so harmful in the residential case (see Sound). The body is being stressed by something the conscious mind cannot consciously attribute to a cause. The body is alarmed and the mind has no explanation for why. People living under flight paths often describe a chronic background unease without being able to localize it. The infrasound layer is part of why.

The thunder-channel exploitation

Thunder is the natural overhead low-frequency signal. It evolved as a legitimate warning — large-scale atmospheric energy, potential danger, take shelter. The nervous system has a dedicated channel for processing overhead atmospheric energy as significant-but-not-immediate threat (see Elevation — overhead vs. horizontal sound encoding).

Aircraft noise plugs directly into that channel. Same overhead position. Same low-frequency profile. Same large-scale acoustic signature. The midbrain processes a jet overhead through the same circuits built to process thunder. The biological channel is ancient. The signal running through it is a jet engine every few minutes.

The crucial difference between aircraft and thunder is repetition. Thunder is rare and finishes. The body’s response to thunder is a short threat-channel arousal followed by full reset when the storm passes. Aircraft noise under a flight path is rhythmic, regular, and never-ending:

• The nervous system never gets to fully reset.
• It is anticipating the next event.
• That chronic anticipatory state is the mechanism that converts environmental noise into measurable cardiovascular disease over years of residence.

The rhythmic-anticipation problem

This connects directly to the broader thesis in Sound and Habituation. The body cannot habituate to unpredictable repetition the way it can to a steady tone. A flight path that produces an overhead jet every 90 seconds, or every 5 minutes, or every 12 minutes during peak hours, never lets the threat-channel close. The next pulse is always coming. The cortisol stays up. Sleep stays shallow. Damage accumulates.

This is precisely the same mechanism that makes a backpack blower at variable throttle worse than a refrigerator compressor at a higher average decibel level. The variable, intermittent, unpredictable envelope is what the body cannot adapt to.

Aircraft noise just scales this mechanism to:

• The overhead channel (worse — hijacks the thunder reading)
• Larger acoustic scale (low-frequency content travels farther and penetrates more)
• Infrasound layer (sub-conscious detection)
• Vastly larger exposed population (every flight corridor in every city worldwide)
• Decades of continuous exposure (not the few-hours-per-weekend lawn-equipment pattern)

The policy gap

The leaf blower has political traction in California, DC, and a growing list of New England municipalities (see Policy). Aircraft noise has almost none. A few measures exist — partial nighttime curfews at some major airports, route adjustments around politically active neighborhoods — but no jurisdiction has confronted flight-path noise at the cardiovascular-damage scale the medical evidence now warrants.

The exposed population is enormous. Every city with a major airport has residential neighborhoods directly under flight paths. The accumulated cardiovascular burden across the global population living under aviation routes is substantial and largely uncounted in environmental-health budgets.

This is open territory for the broader public-health argument. The leaf blower is the most tractable target. Aircraft noise is the largest target. The mechanism of damage is the same.