Highway, Train and Plane Noise in North Jersey: What Actually Quiets a House

Noise is not one thing. A road, a railroad and an aircraft put different mixes of sound into a house, and a window treats the mixes differently.

Road traffic is steady and broadband: tire hiss and engine noise across the range, with a heavy truck adding a low rumble. Rail is short, loud events: wheel squeal and horns at the high end, and a low-frequency growl from locomotives and freight cars. Aircraft arrives overhead as an event with a large low-frequency component, so it can be felt as well as heard.

Higher frequencies are the easy part. Laminated glass with an acoustic interlayer damps them well, which is why voices, sirens, tire hiss and squeal fall furthest behind good glass. Low frequencies are the hard part, because they carry through mass and structure. A deep airspace helps most with low-frequency rumble; our STC ratings guide explains why.

That is also why the rating matters. STC (ASTM E413) is the number most window makers publish, and OITC (ASTM E1332) counts low frequencies more heavily and so fits traffic and aircraft better. Compare like with like.

These are the main noise corridors in North Jersey. The point is not a decibel figure, which varies by house and hour, but which kind of noise each one is.

Sound walls beside a highway work by breaking the line of sight between the road and the listener. They help the ground floor and the yard, and they do much less for a bedroom on the second floor, because a window above the top of the wall's shadow can still see the road over it. If you live above a wall, treat the upstairs windows as unprotected.

The federal rules explain why a wall may or may not exist near you. Under 23 CFR 772, the FHWA noise abatement criterion for residential land is 67 dBA Leq(h) (Table 1), and a barrier is considered when predicted noise approaches or exceeds it and the barrier is both feasible and reasonable. Those rules govern federally funded highway projects. They are not a promise that a wall will be built, or that your upstairs room is protected, and not a standard your house has to meet.

The FAA approved the Teterboro Airport (TEB) Noise Compatibility Program on January 10, 2023. The notice, titled Approval of Teterboro Airport (TEB) Noise Compatibility Program, was published in the Federal Register on January 17, 2023 (Doc. 2023-00651). Among the measures approved was LU Measure 2: Sound-Insulate Eligible Dwelling Units.

That is the extent of what we can verify. Approval of a program is not funding for it, and we have not confirmed the funding, the eligibility map or whether sign-ups are open. The Port Authority of New York and New Jersey operates Teterboro, so it is the place to ask whether your address qualifies and how to apply.

How eligibility generally works: under 14 CFR Part 150, residential land use is generally treated as compatible with airport noise below DNL 65 dB, so programs of this kind usually look at homes in the higher-noise contours on the program's own map. We do not run the program and cannot tell you whether you qualify. We make no claim about any program for Newark Liberty.

The order below runs from least to most involved. It is a cost and disruption order, not a strict ranking by STC: on published ratings an interior insert is the strongest of the three glass options.

1. Seal the gaps. Worn weatherstripping, open caulk joints and loose hardware let sound around the sash, and it is the cheapest step to fix. It does little against sound that comes through the glass itself, and it is the first thing to rule out. Our hardware upgrades service covers worn locks and balances, and the drafty windows guide covers the sealing basics.

2. Add an interior insert. A laminated-glass pane is set 2 to 4 inches inside the window you have, about STC 40 to 48 over double-pane on manufacturers' published ratings. A typical job runs $1,200 to $4,000 for one bedroom (2 to 3 windows), $2,500 to $8,000 for one noise-facing side (4 to 6 windows) and $5,500 to $15,000 for a whole house (10 to 12 windows). It removes nothing, which is why it suits historic, rented and condo windows. See soundproof window inserts.

3. Swap in acoustic glass. When the frames and sashes are sound and can carry heavier glass, the insulated unit is replaced with an acoustic laminated one, typically STC 35 to 40. A typical job on 4 to 6 windows runs $2,000 to $6,000, and glass-only replacement typically runs 30 to 50% of the cost of a new window. Under N.J.A.C. 5:23-2.7(c)1iv, replacing the glass in a window is ordinary maintenance, provided the new glass meets the code. See acoustic glass replacement.

4. Replace the window. Worth doing when the windows are failing anyway. Adding laminated glass to a standard replacement job runs about $2,000 to $5,500 more on 10 to 12 vinyl windows, on top of $7,000 to $18,000. A same-opening replacement is covered by N.J.A.C. 5:23-2.7(c)1v, with conditions: a replacement egress window may not come back smaller in required height, width or net clear opening, and opening protectives in fire-rated assemblies are excepted.

Start with the rooms where sleep matters and the noise arrives, not the whole house. Treat the bedrooms that face the road, the track or the approach first, then the living areas if the budget allows. Sound takes the weakest path, so check the door on that side and any vent or gap near the window as well.

Tell us the rooms and the source: road, rail or aircraft. That is usually enough to say which option fits and give a range, and nothing is measured until you decide. Quotes are free, usually by phone, and in person for bigger jobs; you can start with the quote form. Typical STC figures and the insert, glass and replacement comparison are in our STC ratings guide.

The documents behind the facts above. Check the current text before relying on a citation for a decision.