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Easy Guide on How to Make A Quiet Muffler for A Generator at Home

Who doesn’t want the generator to be less noisy? Besides the generator unit is known to contribute to air pollution, it’s also infamous for its loud sounds when running – creating a risk if operating the machine at night when there’s less ambient noise. Therefore, it may be necessary to find solution to deal with its loudness. So, how exactly a unit’s owner can mitigate the unwanted noise? You may learn about how to make a quiet muffler for a generator as a DIY project below. It helps to lower the machine’s overall noise and finally coexist peacefully with the neighbors.

How Loud Are Generators?

how to make a quiet muffler

Most people already know that generator is a loud thing, but exactly how noisy they can be? In average, portable generators which is the most common type to be used for residential or recreational purposes, emits 70 to 100 dBA noise level from 23 ft. away (the standard noise measurement distance).

Obviously, the number depends on the size and model, as there are some models that designed specifically to operate in more silence manner. However, these specifically built units usually available at pricier cost. Luckily, there is a cost-friendlier solution for this issue: use a sound muffler component. It will be useful for people who already own a generator too, so they don’t have to spend money on purchasing a new one.

How to Make a Quiet Muffler for a Generator

To create a sound muffler for a generator, it is important to first know the exact dimension of the unit then build a wooden frame accordingly, before proceeding to attach the sound insulator. This can be a homemade project over the weekend.

Read the step-by-step guide on how to make a quiet muffler for a generator in the following:

1. Calculate the estimated dimension of the sound muffler sound

You need to create a silencer box that can occupy your generator unit comfortably. It is essential to add several extra inches on each of the box’s side in order to provide ventilation and sufficient air flow inside.

2. Set a ventilation system

Having enough air to flow and circulate inside the silencer is critical to ensure safe operation and durability of the generator itself. First, create a vent duct on the box’s roof area, then set the vent duct on the muffler box that’s on the opposite side of the first one.

3. Install a mating surface or layer of isolating

To help avoid leakage on the sound, mating surface can provide air tightness to certain degree. Isolating layer can help too. In general, sound is produced by the changes on air pressure when there’s vibration, so it’d be beneficial to lessen the vibrations by using a layer between the sound muffling box and the ground.

4. Build the wooden frame according to the calculated size

Next step on how to make a quiet muffler for a generator is by constructing wooden frame with the size accordingly.

5. Install the sound insulation

Sound insulation is built by adding layers with space between each of it. This way, the sound will be able dissipate because there’s a material layer to mitigate the sound. Some examples of material are plywood, foam, or mass loaded vinyl.

It’s time to install the sound insulation material of your choice. It is best to go with lightweight material. To apply, use high-quality glue and start to set the pieces into the inner part of the box.  Make sure that you leave free space inside the box between the layers, to allow the noise to dissipate within and finally being absorbed by the noise muffling material.

6. Provide additional insulation

To increase the effect of sound reduction, consider to use extra insulation layers on the inner walls of the muffling box. For instance, you may choose to apply anti-vibration pads, which works by absorbing the entire vibration and reduce reverberation within the silencer.

7. Assemble the sound muffling to the generator

This is the last step of how to make a quiet muffler for a generator. You have to assemble the enclosing box by carefully place the box on top of the generator and screw the components securely.

The Tips for Keeping Noise Levels Down

The tutorial of how to make a quiet muffler for a generator will no doubt help you to reduce the loud noise. However, there are also some simple things you may do to lower the sound further, which are:

1. Locate the generator unit at considerable distance from your house

This may sound like an obvious tip, but a lot of people don’t actually consider the exact minimum distance to put their generator. The noise level that’s included in the unit’s specification by manufacturer is measured at 23 ft. distance, so that’s the proper distance if you want to get the claimed noise level. Installing the unit in proper range from your house will help a lot to cut down the audible noise.

2. Make the exhaust face the opposite direction of your house

If it is unfortunately not possible to move the unit farther away, then there is another way to maintain lower noise level. As you may have known, exhaust is the main noise source of the machine, so it’s only logical to make it facing away your house’s direction. It can result in huge difference because the sound waves won’t directly travel to the direction of your house.

3. Invest in generator that’s specifically built to emit low noise level

This is a practical solution in case your bank account allows. There are plenty of high-quality low-noise generators available in the market that you can choose over as investment.

Please keep in mind the tutorial on how to make a quiet muffler for a generator. The provided tips won’t be able to eliminate the noise entirely. They can help to reduce the amount of sound, drastically at the best. It is just practically impossible to remove the motor noise completely. Hopefully, the guide will help you to create a more peaceful living or working environment.

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