Noise Reduction | FSJ Tactical
Noise Cancelling Windows That Also Deliver Security Glazing Protection
Cut street and traffic noise with a DefenseLite polycarbonate window insert. FSJ Tactical installs systems that quiet interiors, improve insulation, and stop break-ins, all over your existing glass.
Traffic, sirens, nightlife, and construction noise make it hard to work, sleep, learn, and heal. Replacing windows to fix it is expensive and disruptive. FSJ Tactical installs DefenseLite polycarbonate overlays that act as noise cancelling windows over your existing glass, and protect your building at the same time.
Quieter Spaces, Stronger Glass
A DefenseLite overlay is a polycarbonate barrier installed over existing window or door glass. It creates an air gap and adds a thick, dense layer that dampens sound. The result is noticeably quieter interiors, plus a nearly invisible layer of protection against forced entry and vandalism.
Acoustic Performance
| Measure | DefenseLite |
|---|---|
| Street/traffic noise reduction | Up to 40% |
| Sound Transmission Class (system) | STC 41 |
| Outdoor-Indoor Transmission Class (system) | OITC 33 |
| Shield thickness | Typically 3/8" polycarbonate (vs. 1/8"–1/4" glass panes) |
| Compatible with | Single-pane and double-pane windows |
OITC is especially useful for buildings near roads and airports because it weights the low-frequency sounds of traffic and aircraft.
How It Works
Added Mass
Thick polycarbonate adds density that resists sound vibration.
Insulating Air Gap
The space between the shield and the glass breaks the path sound travels.
Engineered Ventilation
Venting controls condensation and moisture to keep glazing clear.
No Replacement
Mounts to the existing frame, with no tear-out, permits, or downtime.
More Than Noise Reduction
Typical noise-cancelling window inserts do one thing. DefenseLite does several:
- Security: resists forced entry and smash-and-grab. Step up to DefenseLite Pro for ASTM F3561 Level 8.
- Insulation: improves the thermal performance of existing glass for lower energy costs
- Storm protection: resists debris and hail (storm proof windows)
- UV protection: reduces fading of furnishings
- Low maintenance: no routine maintenance required, unlike laminated glass
Ideal for
Offices, schools, hospitals, hotels and short-term rentals, retail storefronts, and homes near busy streets, rail lines, airports, or entertainment districts.
Comparing Noise-Reduction Options
| Option | Noise Reduction | Security | Disruption |
|---|---|---|---|
| Seal gaps with acoustic caulk | Low | None | Low |
| Basic window inserts | Moderate | None | Low |
| Soundproof replacement windows | High | Varies | High |
| DefenseLite polycarbonate overlay | Up to 40% street noise | Forced-entry resistant | Low |
Get a quieter, safer building. Contact FSJ Tactical to discuss noise cancelling windows for your property.
Security Film + Glazing
See It Stop a Threat: FSJ Tactical Live Fire Demos
Request a live fire demonstration of our products on any existing drywall or glass.
Peace of Mind: Installed
Recent FSJ Tactical projects for school districts, cities, and counties. Over 500,000 square feet protected.
Installation available in every state
NATURAL DISASTERS
Security film and polycarbonate glazing hold glass in place against storms, debris, and blasts.
CRIME
Forced-entry and ballistic protection delays attackers and buys time for law enforcement to respond.
PEACE OF MIND
FSJ Tactical protects occupants and assets with an industry-leading warranty and nationwide installation.
Frequently Asked Questions
How much noise do DefenseLite windows block?
DefenseLite overlays can reduce street and traffic noise by up to 40%. A complete DefenseLite system has been rated at STC 41 and OITC 33. Actual results depend on your existing windows and noise source.
How do noise cancelling window inserts work?
The polycarbonate shield adds mass and creates an insulating air gap in front of the existing glass. That combination dampens sound before it reaches the room.
Do they work on double-pane windows?
Yes. DefenseLite overlays work over single-pane and double-pane windows. The improvement is typically greatest on single-pane glass.
Will the air gap fog up?
No. An engineered ventilation system limits condensation and moisture buildup to keep the glazing clear.
How are they different from regular soundproof windows?
Soundproof replacement windows are effective but costly and disruptive to install. Most window inserts reduce noise only. DefenseLite installs over existing glass and adds forced-entry security, impact resistance, and insulation along with noise reduction.
Let's talk about your project...
Talk with the FSJ Tactical team about a site assessment. We'll walk your building, identify the glass and doors at highest risk, and recommend the DefenseLite security glazing level that fits your threats and your budget.
