Where the claims come from.

Public-health guidance

• World Health Organization Regional Office for Europe — Burden of Disease from Environmental Noise (2011) and the WHO Europe noise fact sheet. The dose-thresholds (less than 30 dB(A) inside bedrooms; less than 40 dB(A) outside; less than 35 dB(A) in classrooms), the cardiovascular effects, the cognitive impairment in children, and the equity dimension all derive from this body of work. Underwrites Health.
• WHO Environmental Noise Guidelines for the European Region (2018) — updated noise-level recommendations across road traffic, rail, aircraft, wind turbines, and leisure noise. Underwrites Health and Sound.

Aircraft and cardiovascular research

• Journal of the American College of Cardiology, 2024 study linking aircraft noise exposure to worse heart structure and function on imaging in residents under flight paths. The headline citation behind Aircraft.
• American College of Cardiology, 2025 public statement calling for concerted government and industry action on aircraft noise as a population-scale cardiovascular hazard. Underwrites Aircraft.
• PMC cardiovascular review on flight-path noise — the full damage cascade: insomnia, sleep-disorder prevalence, elevated stress hormones, oxidative stress, endothelial dysfunction, arterial stiffness. Underwrites Aircraft.
• Frontiers in Behavioral Neuroscience, 2026 paper documenting that infrasound exposure elevates cortisol and produces more negative affect in subjects even when they cannot consciously detect the sound. Underwrites the infrasound layer on Aircraft and Sound.

Occupational standards

• OSHA Occupational Noise Exposure standard, 29 CFR 1910.95. Permissible exposure limit of 90 dB(A) as an 8-hour TWA, with a 5 dB exchange rate. Underwrites Workers.
• NIOSH Criteria for a Recommended Standard: Occupational Noise Exposure, revised 1998. Recommended exposure limit of 85 dB(A) TWA with a 3 dB exchange rate — the more medically-protective standard. Underwrites Workers.

Regulatory precedent

• California Assembly Bill 1346 (2021) — directs the California Air Resources Board (CARB) to phase out new gas-powered Small Off-Road Engines (SORE), including leaf blowers, beginning 2024. The leading state action; the empirical existence proof that bans are operationally feasible. Underwrites Policy.
• D.C. Law 22-281 — District of Columbia ban on gas-powered leaf blowers, taking full effect in 2022. Underwrites Policy.
• Massachusetts municipal-ban inventory — a growing list of New England towns and small cities have enacted seasonal or year-round bans. Quiet Communities Inc. and similar advocacy organizations maintain working maps; treat their lists as starting points and cross-check against current municipal-code text for any specific jurisdiction.

Acoustical and infrasound research

• Vic Tandy — “The Ghost in the Machine,” Journal of the Society for Psychical Research, 1998. The standing-wave-at-18 Hz study that documented physiological and perceptual effects of infrasound at intensities not consciously detectable. Underwrites Sound.
• Acoustical Society of America publications on amplitude modulation, the frequency-following response, and low-frequency noise. Underwrites Sound.
• Aalto University acoustic research — stochastic-process modeling of wind-chime sound generation. Underwrites Wind chimes.
• JSTOR brain-rhythms paper — on the pathological consequences of rigid periodicity in neural rhythms, and the biological appropriateness of statistical variability. Underwrites the stochastic-resonance argument on Wind chimes.
• Sound-elevation encoding research, NIH-indexed — dedicated neural architecture in the auditory cortex for processing vertical position of sound sources. Underwrites Elevation.
• Looming-sound research — midbrain threat-circuit response to sounds growing louder along the horizontal plane. Underwrites Elevation.

Entrainment, oscillation, and rhythm

• AAAI study on ticking clocks pacing human work — the canonical experimental demonstration that subjects synchronize to a clock’s tempo without conscious decision. Underwrites Clock.
• 2004 neuroscience reference paper on oscillation — “Clocks tick, bridges and skyscrapers vibrate, neuronal networks oscillate”; framing the brain as an oscillating system that can couple to external rhythmic input. Underwrites Clock.
• MDPI physiological entrainment review — rehabilitative and cognitive applications of rhythmic stimulation; entrainment as a documented mechanism rather than metaphor. Underwrites Clock and Sound.

Schumann resonance and brain entrainment

• Winfried Otto Schumann (1952) — the original mathematical prediction of the resonant frequencies of the Earth’s atmospheric cavity. Underwrites Schumann.
• Subsequent measurement literature confirming the 7.83 Hz fundamental and the harmonic series at ~14, 20, 26, 33 Hz. Underwrites Schumann.
• EEG studies on Schumann synchronization — documented intermittent synchronization of human brainwaves with the Schumann fundamental during deep near-sleep relaxation. Underwrites Schumann and Solar time.
• HeartMath Institute publications on Schumann disruption and cardiovascular events — correlation between Schumann anomalies, solar events, and human autonomic stress responses. Underwrites Schumann.

Birdsong, laughter, and social-cohesion research

• Nature, 2022 study testing birdsong against traffic noise on anxiety and paranoia in healthy subjects. Birdsong reduced anxiety regardless of species diversity; traffic noise increased depressiveness regardless of variety. Underwrites Birdsong.
• Phantom Chorus study — amplified birdsong played through hidden speakers in nature areas improved well-being scores; most subjects did not consciously notice the manipulation. Underwrites Birdsong.
• Natural History Museum research on bird sounds that specifically relieve mental fatigue. Underwrites Birdsong.
• Robin Dunbar (Oxford evolutionary psychology) — the laughter-as-acoustic-glue framework; laughter as a social-cohesion signal predating language. Underwrites Laughter.

Water, ions, and nature-soundscape research

• EEG stress-recovery study comparing water, birdsong, and wind against silent control — all three produced measurable recovery, with water producing the fastest and deepest response. Underwrites Riverbank.
• PMC study on natural soundscapes dominated by water — accelerated recovery from induced psychological stress compared with urban noise. Underwrites Riverbank.
• Frontiers in Psychology nature-soundscape review — wind, birdsong, and water as the three core sounds defining a healthy natural soundscape. Underwrites Wind chimes and Riverbank.
• Ecological mental-health study on canals and rivers — significant wellbeing improvements from time spent at riverbanks specifically, distinct from parks or forests generally. Underwrites Riverbank.
• The Lenard effect — the physical process by which breaking water droplets generate negative ions, with documented downstream physiological effects on oxygen availability, serotonin regulation, and fatigue. Underwrites Riverbank.

Sleep and cardiovascular literature

• Matthew Walker, Why We Sleep (2017). Synthesizes the contemporary literature on sleep deprivation as a driver of cardiovascular outcomes, cognitive decline, immune function, and metabolic disease. Underwrites the public-health framing on Health and Habituation.
• Recent meta-analyses on chronic noise exposure and cardiovascular outcomes — available via PubMed searches on “chronic noise” + “cardiovascular,” “noise pollution” + “sleep architecture,” and similar.

Houston / Texas regulatory environment

• Texas Local Government Code — noise-related chapters; the absence of a statewide preemption explicitly authorizing or restricting municipal noise bans on lawn equipment.
• City of Houston Code of Ordinances — noise, nuisance, and residential zoning chapters; existing quiet-hour provisions where they exist.
• City of Houston 311 Open Data — via the City of Houston Open Data Portal. The dataset for assessing the actual frequency, time-of-day distribution, and disposition of residential noise complaints in Houston.
• Texas Legislature Online (capitol.texas.gov) — for any historical or pending legislation on small-engine noise or air quality at the state level.

Worker advocacy and audiometric data

• OSHA enforcement-data portal — for the citation history of commercial-landscape operations.
• NIOSH publications database — for occupational-noise-induced hearing loss research, including studies of commercial-landscape worker populations.
• State workers’-compensation claim databases — for documented hearing-loss claims in the landscape sector.
• Fe y Justicia Worker Center (Houston) — an immigrant-worker advocacy organization positioned to engage with the equity dimension of the worker-exposure argument.

Contact

Corrections, additional sources, or pointers to municipal ordinances, audiometric data, or research that should be cited here: blownaway [at] honto [dot] me.