Turn Generator Noise Into Silence

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Turn Generator Noise Into Silence

Table of Contents

  1. Introduction
  2. Building Materials Needed
  3. Cutting the OSB Plywood
  4. Assembling the Sides
  5. Adding Hinges and Strips
  6. Attaching the End Piece
  7. Installing Aluminum Angles
  8. Installing the Sound Panels
  9. Installing the USB Fan
  10. Sanding and Painting
  11. Sound Testing
  12. Conclusion

Building a Wooden Generator Noise Reduction Box

Are you tired of the loud noise that your generator makes? Looking for a solution to reduce the noise and create a quieter environment? In this article, we will guide you through the process of building a wooden generator noise reduction box. We will provide step-by-step instructions on how to construct the box using OSB plywood and flame retardant sound-absorbing panels. Additionally, we will discuss the importance of sound testing and highlight the effectiveness of the box in reducing generator noise.


Generators can be noisy, especially when running for extended periods. The noise can be bothersome, especially if you live in a neighborhood with close proximity to your neighbors. Building a noise reduction box for your generator can help minimize the noise levels significantly. In this article, we will provide detailed instructions on how to build a custom noise reduction box for your generator.

Building Materials Needed

Before starting the construction process, let's gather all the necessary materials. You will need:

  • OSB plywood
  • Flame retardant sound-absorbing panels
  • Hinges
  • Strips of wood
  • Aluminum angles
  • Sheet metal screws
  • Acoustic sound panels
  • USB fan
  • Zip ties
  • 5/8" brad nails
  • Paint and stencils (optional)

Cutting the OSB Plywood

To begin, carefully measure and cut the OSB plywood into three main sections: the top, the end, and the two sides. One end of the box should remain open to allow the noise to escape. The rough measurements for the cut pieces will depend on the size of your generator. Make sure to measure accurately and adjust the dimensions as needed.

Assembling the Sides

Once the plywood is cut, label the two sides as "Side One" and "Side Two." Side One should be 24 inches wide, while Side Two should be slightly narrower, at 23 and a half inches wide. Both sides should be cut at a five-degree angle to ensure that the box sits level. Secure the sides together using nails or screws, ensuring a sturdy construction.

Adding Hinges and Strips

Next, attach the hinges to the bottom of the lid using strips of wood. One strip should measure an inch and a half by three-quarters, while the other should be an inch and a half by an inch and a quarter. Mount these strips on the bottom side of the lid, ensuring a secure fit. Use pilot holes before screwing in the strips to avoid splitting.

Attaching the End Piece

To attach the end piece, leave a half-inch gap between the mounted strips. This gap will allow the end board to slide in and span between the two sides. Use aluminum angles to connect the end piece securely. Cut two pieces of aluminum angle, measuring 24 inches long, and drill holes every three inches to attach them to the sides. Additionally, drill a 3/8" inch hole on the side for a detent pin.

Installing Aluminum Angles

Secure the aluminum angles using sheet metal screws, ensuring a tight fit. This step reinforces the structure and adds stability to the box. Make sure all the screws are properly tightened to avoid any potential issues.

Installing the Sound Panels

Now it's time to install the flame retardant sound-absorbing panels. Cut the panels to fit the interior of the box and use a spray adhesive to attach them securely. Leave an inch of space between the panels and the bottom of the box to prevent moisture from wicking up from the ground. For additional cooling, install a USB fan inside the box, securing it with zip ties.

Sanding and Painting

Before painting, sand the entire box to create a smoother surface. If desired, paint the box with camouflage paint using stencils for a unique and stylish appearance. This step is optional but can add a personalized touch to your noise reduction box.

Sound Testing

To evaluate the effectiveness of the sound box, conduct sound testing before and after its installation. Use a decibel meter to measure the noise levels produced by the generator both with and without the box. Compare the results and note the significant reduction in noise levels with the box installed. Furthermore, safety should not be overlooked, and it's essential to ensure proper ventilation and carbon monoxide monitoring when the generator is enclosed in the box.


Building a wooden generator noise reduction box can significantly reduce the noise produced by your generator. By following the step-by-step instructions provided in this article, you can create a custom box using OSB plywood and flame retardant sound-absorbing panels. Additionally, conducting sound testing will demonstrate the effectiveness of the box in reducing noise levels. Enjoy a quieter environment while running your generator efficiently.


  • Reduce generator noise with a custom noise reduction box
  • Step-by-step guide to building a wooden generator noise reduction box
  • Materials needed: OSB plywood, flame retardant sound-absorbing panels, hinges, aluminum angles, etc.
  • Proper installation and ventilation are important for safety
  • Conduct sound testing to measure the effectiveness of the noise reduction box


Q: Can I build a noise reduction box for any generator size? A: Yes, the dimensions of the box can be adjusted to fit different generator sizes. Measure your generator carefully and make the necessary modifications during the construction process.

Q: How effective is a noise reduction box in reducing generator noise? A: A properly constructed and installed noise reduction box can significantly reduce generator noise levels. Sound testing before and after installation can provide concrete evidence of the box's effectiveness.

Q: Do I need to ensure proper ventilation inside the noise reduction box? A: Yes, ventilation is crucial to prevent heat buildup and ensure the generator runs efficiently. Additionally, it is essential to monitor carbon monoxide levels and have a CO2 alarm installed when enclosing the generator in the box.

Q: Can I customize the appearance of the noise reduction box? A: Absolutely! After building the box, you can paint it with your desired color or use stencils to create unique patterns and designs. Personalizing the box can make it visually appealing while serving its purpose of noise reduction.

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