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How to Make a Generator Quiet – Reasons for Noise & Methods to Reduce

You use a generator for different purposes like for domestic uses, factory purposes, etc. One thing that makes this machine so comfortable to use is its handiness and helpfulness. The indoor and outdoor use of generators make them favorable for customers. But with all the noise it creates, it can sometimes become irritating. Though generators play an essential role in your daily life, the noise can be a drawback. You certainly give a thought on generator noise reduction. We are here for your aid. Here, we will answer all the queries, including how to quiet a generator in detail.

What Decibel Rating is Loud for a Generator?

Before judging if the generator is loud or not, let us determine based on which factor it is considered loud. Generally, the noise of a device is measured in terms of decibels. When you consider car horns or any music concerts, you are exposed to around 110 db of very high noise. A normal moderate rainfall can produce around 40 db of noise. If you saw a hike of 10-decibel points, the noise is 10 times louder. Generally, the generators available in the market have around mid-50 to mid-80 decibel levels. So if you want to choose a quieter generator, opt for less decibel range. If you are already using a noisy generator, follow the below methods to know how to quiet down it.

What Makes a Generator Loud?

Why do generators make so much noise? To answer this question, we have to dive deep into the mechanism of a generator. As we all know, generators run on engines and produce electrical energy. This process of production of energy makes noise with the help of an engine. Though, some units come with automatic noise cancellation and noise reduction features. Another reason for the noisy nature of this power source is the vibration they cause while running on the ground. The power generators created are so high that they vibrate when they come in direct contact with the ground.

The cost of generators also determines the noise level. Expensive generators usually come with sound-eliminating features. At the same time, budget machines can make your generator make more noise. Sometimes, the noise your generator makes can be due to some issue with your machine. For example, if you notice some smoking or irregularities, you should get your generator repaired.

How to Quiet a Generator?

You would think to yourself that you are completely helpless when treating a noisy machine. But you are not! You can correct the sound of your generator without any great difficulties. The first step in this process is that you find the cause of that excessive noise and give some attention to the maintenance of your power back up system. You can follow some tricks to make your generator quieter. Let’s see how to silence a generator using 8 different techniques.

8 Different Ways for Silencing a Generator

1. Exhaust Pipes Angle

Generally, an exhaust pipe carries out gasses from vehicular engines. Similarly, the exhaust pipe of a generator carries out the gas from the engine and works as the gas discharger. It also decreases the back pressure and prevents an abrupt increase in temperature. Insulating pipes are preferred for exhaust pipes. The exhaust pipe’s angle must be an upward angle. This pipe should always be facing against the work area. Gently bend the exhaust pipe and make it face the sky. This will lead the noise away from you.

2. Baffle Box

Enclosures work to eliminate unnecessary noise. These boxes are the chambers for trapping the excessive noise coming from big machines. These boxes are specifically built to minimize noise pollution and muffle noise to acceptable hearing levels. Enclosures are used as noise canopies. The panels present in these boxes trap and absorb the noise. They are very easy to use and install. Enclosures are easy-to-maintain boxes. The best thing about these boxes is that they are cheap and easily made at home. You need to make holes in the homemade boxes for easy airflow.

3. Replacing Generators Muffler

A very easy and most effective way for making a generator quiet is to place a muffler on top of it. As the name suggests, the muffler works as a panel that absorbs the extra noise. Its work is to muffle the generator’s noise to a minimal hearing level. This muffles the noise coming out from the exhaust pipe and reaches the motor. The design is to absorb all the noisy radiations coming out of the unit and pound them back on the low level. Therefore, the quality of a muffler decides the level of noise your generator will produce.

4. Sound Deflectors

If your generator is kept in a closed shed, sound reflectors can help you a lot. But you need to know that there is a distinction between soundproofing your generator and sound deflecting. Soundproofing lowers the noise level so it won’t hurt or disturb you. On the other hand, sound deflectors scatter the noise so it won’t reach you. The noise is born in the generator but reaches and mixes into the air. Thus, there are fewer chances that the extra noise will reach you if you deflect the sound.

5. Flat Surface or Absorbing Mat

The noise of a generator is sometimes produced by the vibration it causes against the ground. Therefore, putting your generator on a soft and mushy platform is a great way to absorb the noise. This will absorb and bedew all the noise rather than raise and purify it. If you cannot find a mushy surface, you must keep your generator on an anti-vibration mat. This mat will absorb the excessive noise and vibration caused by the generator and reduce the noise to a low level. If you don’t have an anti-vibration mat, rubber mats are a great alternative.

6. Keep the generator in a suitable place

If your generator is making excessive noise, the first thing you ought to do is change the units position far away from your working area. Place your generator at a distant place, and your problem is solved. You can check the decibel rating of every generator on their labels which is measured concerning 7 meters of distance. Therefore, according to the thumb rule, you should keep your generator 15-20 feet away from you. You can also place it on a sloppy and soft surface to avoid excessive vibration.

7. Make a soundproof box for the generator

You can try and make a soundproof box. The box will make your generator heavy, which decreases the vibrations it creates. This method is very effective, and it works in the same manner as deflectors work. The box’ wall traps the noise your generator produces and doesn’t let the radiation escape. This box can prove to be very useful. A soundproof box is composite and hard, making it tough for the noise and vibrations to escape. Make some holes in the box, which will make the airflow constant; otherwise, the excessive heat will vandalize the generator.

8. Continuously provide water to your generator

In case you don’t want to change your generator’s muffler, you can use water as an alternative. But it would help if you used something a little tailored and personalized. It would help if you had some gallons of water and kept the generator above the surface level. While filling the generator with water, make sure that the water doesn’t flow in the main pipe of your generator. To avoid water flowing in the main pipe, you can create holes in the hose and connect it to the waterline.


Can you leave a generator in the rain?

No, you cannot leave a generator out in the rain. It would help if you did not run your generator at a place where it gets moisture and mist. When it is raining, your generator should be covered. If it gets wet, it can lead to dangerous electrical mishaps.

How long do generators last?

The lifespan of any generator depends on its size and power outage. Moreover, the average time is 1500-3000 hours. This means that a generator would last for 15-45 years. The longevity is also determined by the level of maintenance you provide to it.

Final Verdict

Now you know everything you need to know about the noise that your generator makes. By going through this context once, you can choose the best generator that suits your purpose. Then, you can try the easy tips and tricks provided to you for making generators quieter. Moreover, you can always eliminate the noise by giving your power back up a soft surface. No matter which method you use to eliminate the noise, ensure that you do not compromise with the working of your generator. Now you are good to go with the maintenance of your generator.