Noise Monitoring in
New Hampshire
Class 1 sound data for New Hampshire's local noise codes.
New Hampshire’s building boom is concentrated in its downtowns and along the Seacoast — housing, waterfront redevelopment, and defense and medical work. New Hampshire sets no statewide construction-noise limit, so the rule that applies comes from the town or city, and Manchester, Nashua, and Portsmouth write the most detailed codes.
Specto equips New Hampshire contractors and consultants with Class 1 monitoring stations that record around the clock, send alerts when a threshold is exceeded, and report automatically. Instead of assembling a system on site, your team installs a configured station and starts documenting conditions from day one — answering questions with data instead of recollection.
Regulatory
The Rules That Apply to New Hampshire Projects
New Hampshire has no statewide construction-noise limit — the state’s Breach of the Peace statute (RSA 644:2) is the backstop, and towns and cities set the specific rules — so the governing standard depends on where you’re working:
- Local ordinances set the limits — towns and cities adopt their own noise codes, commonly setting residential limits near 60 dB(A) by day and 50 dB(A) at night, measured at the property line, with many also using a “plainly audible” or reasonable-person standard
- Manchester (Ch. 94) — regulates construction equipment and sets quiet hours from 10:00 p.m. to 7:00 a.m. on weekdays and Saturdays, extending to 9:00 a.m. on Sundays
- Nashua and Portsmouth — Nashua regulates construction noise under a dedicated chapter of its code, and Portsmouth enforces a Noise Control Ordinance, both with defined limits and hours
- Quiet hours and enforcement — most communities set nighttime quiet hours from 10:00 p.m. to 7:00 a.m. and enforce on complaint, using either a decibel reading or an audibility standard
- Federal and state rules — federal OSHA worker noise exposure requirements (29 CFR 1926.52) and FHWA 23 CFR 772 apply, alongside NHDOT requirements and project-specific permit conditions
Why New Hampshire Teams Choose Specto
01
Ready to Deploy: US Inventory
Specto stocks Class 1 noise monitoring systems in the US for rent or purchase. Teams in Manchester, Nashua, Portsmouth, Concord, and the Upper Valley can have monitoring on site in days — before a concern turns into a delay.
02
Field-Ready: Configured Before Shipment
Each station arrives with alert thresholds, reporting schedules, and SvanNET remote access already set. Your crew installs and starts recording, instead of assembling a system on site.
03
Applied Expertise: City-by-City Codes
A New Hampshire threshold depends on the local ordinance, and limits, quiet hours, and construction rules differ between Manchester, Nashua, Portsmouth, and smaller towns. Specto configures each station to the standard governing your site, with automated reports built for agency and community review.
Who Uses Specto in New Hampshire
We don’t replace consultants — we equip them. Common users include:
Environmental consultants
Geotechnical engineers and materials testing firms
Construction managers and general contractors
NHDOT and federally funded transportation teams
Housing, waterfront, and institutional project teams
The New Hampshire Construction Landscape
New Hampshire is in the middle of a housing boom — the state hit a 20-year high in housing production in 2025, and new pro-housing laws are pushing multifamily and mixed-use projects in Manchester, Portsmouth, Concord, and Keene. The Seacoast is especially active, with Portsmouth’s waterfront redevelopment and the Pease tradeport, and across the river the Portsmouth Naval Shipyard is midway through a roughly $1.9 billion dry-dock expansion.
Add in defense and manufacturing work around Nashua, hospital and university expansions, and steady NHDOT bridge and turnpike projects, and much of this construction lands on infill sites and in established downtowns. Continuous monitoring gives New Hampshire teams the data they need to document conditions, respond to concerns quickly, and keep work moving.
New Hampshire Firms Working in
Noise-Sensitive Environments
New Hampshire’s engineering, environmental, and construction community handles the projects where noise monitoring matters most. Firms active across the state include:
Terracon
Manchester
National geotechnical, environmental, and construction materials testing firm with a Manchester office, supporting building, transportation, and infrastructure projects across New Hampshire.
Sanborn, Head & Associates
Bedford
Bedford-headquartered environmental and geotechnical engineering firm serving solid-waste, industrial, energy, and public-sector clients, with expertise in site investigation, remediation, and complex ground and groundwater challenges.
John Turner Consulting
Portsmouth
Construction materials testing and special-inspection firm with New Hampshire operations, providing concrete, soils, and structural inspection for building and infrastructure projects across the state.
Verdantas
Manchester
Environmental and civil engineering consulting firm with a Manchester office, providing water, environmental, and geotechnical services for infrastructure and development projects across New Hampshire.
Heath Hathaway Drilling & Blasting, LLC
Fremont
New Hampshire drilling and blasting contractor providing rock excavation, controlled blasting, and site preparation for construction and infrastructure projects across the region.
Nobis Group
Concord
Concord-based civil, geotechnical, and environmental engineering firm established in 1988, serving commercial, federal, state, and municipal clients with site development, remediation, construction management, and permitting.
Working on a New Hampshire project that needs noise monitoring? Specto supports consultants and contractors as a technology partner.
Recommended System for New Hampshire Noise Monitoring
Svantek SV 307A Class 1 Noise Monitoring Station
Deploy once. Monitor for months.
Permanent Class 1 noise monitoring built for continuous outdoor deployment, with a patented dual-microphone system check that verifies the measurement path remotely.
Available to rent or buy from Specto's US inventory.
- Class 1 accuracy to IEC 61672-1:2013, with optional 1/1 and 1/3 octave analysis to IEC 61260-1:2014
- Noise statistics computed on the station — Ln (L1–L99), Lden, LEPd, two rolling Leq, and a complete histogram in meter mode
- Lifetime Svantek warranty on the patented MEMS microphone; three-year warranty on the instrument
- IP 54 housing rated from −20 °C to 60 °C, with 32 GB microSD storage upgradeable to 128 GB
- Patented dual-microphone system check, plus a built-in sound source producing approximately 100 dBA at 1 kHz for manual or automated verification
- Built-in 4G modem for SMS and email alarms, with results and configuration available through SvanNET
- Battery operation up to 6 days with the modem off and up to 5 days with it on, plus solar, AC, and external DC (10.5–24 V) power options
- Optional triggered audio recording and live audio streaming to support noise source identification
Our Methodology — How We Work With You
01
Discovery
We start by understanding the project, not by selling equipment. That means scope, timeline, and location; monitoring requirements and regulations; site constraints like power, connectivity, and access; and who needs the reports.
02
System Design and Preparation
We bring together the hardware, sensors, power and connectivity strategy, software setup, alerts, reporting, mounting, and accessories — then configure and prepare the system so it arrives ready for the field.
03
Delivery, Onboarding and Support
We support your team through deployment guidance, practical training, troubleshooting, reporting and alert support, and calibration and service coordination for the life of the project.
New Hampshire Noise Monitoring — Common Questions
No. New Hampshire has no statewide construction-noise standard; the state's Breach of the Peace statute (RSA 644:2) serves as a general backstop, and towns and cities set the specific rules. Manchester, Nashua, and Portsmouth have the most detailed ordinances, typically combining residential decibel limits, construction hours, and quiet hours from 10:00 p.m. to 7:00 a.m., while smaller towns often rely on a plainly-audible or reasonable-person standard. Confirm the governing rule for your site with the authority having jurisdiction.
Yes. The SV 307A is built for continuous outdoor operation in cold climates, and a heated microphone option is available to help manage freezing and high-humidity conditions. For the coldest, most exposed sites, the practical questions are enclosure siting and staying within the station's rated operating range, so it's worth confirming the deployment plan for winter work with your supplier.
Long deployments are where remote verification matters most. The SV 307A pairs a patented dual-microphone system check with a built-in sound source for manual or automated verification, so you can confirm the measurement path without a site visit, and data stays available through SvanNET for the life of the project. A built-in 4G modem sends SMS and email alerts the moment a threshold is exceeded.
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