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Noise Experiment

How Far Will You Hear It?

This animation models the projected noise impact zone of a proposed AI data center as expanding sound waves — showing which homes fall within range of its constant industrial hum.

Click any home icon in the diagram below to see its estimated noise exposure
0.25 mi
0.75 mi
1.5 mi
2.5 mi
Noise Impact Rings
0.25 mi — 65–75 dB
0.75 mi — 50–65 dB
1.5 mi — 40–50 dB
2.5 mi — 30–40 dB
3.5 mi — LF hum (toggle)
Rings pulse outward to represent sound radiating from the facility. Click the 🏭 or any 🏠 for details.
Click the 🏭 data center or any 🏠 home icon above to see estimated noise exposure and health impact at that distance.

🔊 Noise by the Numbers

Industrial data center cooling systems run 24 hours a day, 7 days a week — unlike construction noise, they never stop. The simulation and table below are an illustrative model built from published acoustic-impact research patterns for a hypothetical facility — not measured readings from a specific real site. Here's what the underlying science says about impact at different distances.

65+ dB
modeled noise level at 0.25 miles — well above WHO's recommended residential night limit of 40 dB[1]
24/7
data center cooling systems never shut down — there is no quiet period, no weekend, no holiday
200 Hz
and below: low-frequency noise passes through walls and standard insulation more easily than higher frequencies[2]
Distance Est. Noise Level Comparison Health Impact
0–0.25 mi
 65–75 dB Busy restaurant, vacuum cleaner Significant sleep disruption, stress response, cardiovascular risk with chronic exposure
0.25–0.75 mi
 50–65 dB Running dishwasher, normal conversation Sleep disruption probable; WHO recommends below 40 dB for outdoor residential areas at night
0.75–1.5 mi
 40–50 dB Quiet suburb, refrigerator hum Audible and disruptive to light sleepers; low-frequency component penetrates walls
1.5–2.5 mi
 30–40 dB Whisper, rural background noise Borderline perceptible; LF component may be felt as pressure or vibration rather than heard
2.5–3.5 mi (LF)
 <30 dB Below standard detection thresholds Low-frequency infrasound may still be perceptible to sensitive individuals; research ongoing

Illustrative model, not measured data from a specific facility. Distance bands are built around WHO noise-health thresholds[1] applied to typical published sound-attenuation-over-distance curves for industrial cooling equipment.

Myth
"The noise ordinance will protect us."
Standard noise ordinances measure A-weighted decibels (dBA), which intentionally underweight low-frequency sound to approximate human hearing sensitivity. Data centers emit a significant proportion of their noise in the 40–200 Hz range, which can pass zoning tests while still causing sleep disruption and cardiovascular stress in nearby residents. A data center can be "compliant" and still be clearly audible inside nearby homes at night.
True
Backup generators can spike noise to 85–100 dB during power events.
NFPA 110 — the standard governing emergency and standby power systems — requires monthly load testing of the full system, not just a quick start-up cycle.[3] A large data center may run many diesel generators rated at 400 kW to 2 MW each. Even with sound attenuation enclosures, monthly testing represents a predictable but significant noise event that is rarely specifically addressed in zoning approvals.

🏘️ If the Data Center Falls in Your Range

Once a data center is built and operating, it is very difficult to reduce its noise output. The time to act is before permits are approved.

01
Document Baseline Noise Now
Hire an acoustic engineer to measure existing ambient noise levels before construction begins. This baseline is critical evidence if you later want to prove that the data center caused a measurable increase.
02
Demand an Independent Acoustic Study
At the zoning hearing, formally request an independent acoustic study — not one commissioned or paid for by the developer. Ask specifically about low-frequency noise (below 200 Hz), not just A-weighted dB measurements.
03
Request Generator Testing Conditions
Ask the county to require that monthly generator tests occur only during daytime hours and that noise readings be taken at the nearest residential property lines — not just at the facility fence line.
04
Form a Neighborhood Coalition
Counties and planning boards are more responsive to organized groups. If you fall within the 2.5-mile ring, your neighbors do too. Use this map to identify others in the impact zone and connect before the public hearing.

📚 Sources

The noise-ring simulation above is an illustrative model, not measured data from a real facility. These are the standards and research it's built on.

  1. World Health Organization, Night Noise Guidelines for Europe — 40 dB Lnight target to protect sleep in residential areas. WHO Compendium, Ch. 11: Environmental Noise
  2. General acoustics principle: lower frequencies attenuate less over distance and penetrate building materials more easily than higher frequencies — standard building acoustics; see the WHO compendium above for health context.
  3. NFPA 110, Standard for Emergency and Standby Power Systems — requires monthly load testing of the full emergency power supply system. NFPA: An Overview of NFPA 110

This is a test/draft page. The proposed facility and its location (Ashburn Corridor, VA) are illustrative examples, not a real, currently-proposed project.

Experiencing Noise from a Nearby Data Center?

Document it and report it. Your firsthand account helps build the evidentiary record communities need to push for accountability.

Submit a Report →