Generator Noise Reduction Shed $30 Design

Generator Noise Reduction Shed. I made this generator noise reduction box design with an open back to allow the heat and exhaust to escape. In this video I show step by step how I made it and then I do sound testing on it.
This sound box design only weighs 10 lbs and collapses into a portable design.
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#mrfredsdiy #soundbox #generator

[@MrFredsDIY]

So what are you guys think? Is this box worth the effort? Let me know your thoughts. ▶️Here is my newest generator sound box design kzbin.info/www/bejne/jZ_CeHlnh7aipdksi=3QVhW5V_QWGCH1Pn

[@-.__.__.-Rad]

No, it does not work - it just looks good. I typically never use a gen in the nice conditions you had... I want to see the test in a storm, 60mph wind gusts, for about 6hrs. Let me know if the box is still there and if the generator is still cool to operate..

[@jacobdominguez8221]

@@MrFredsDIY you have a small generator. I’ve tried this before and my generator nearly burned the engine. It overheated. Your oil will break down fast and need of changing it often. You need good ventilation or a fan inside. My generator is twice the size of yours and was advised not to do it without an internal fan for airflow. Good design though.

[@MrFredsDIY]

Thanks for commenting! What size is your generator? We did a pretty thorough testing video with a thermometer in the oil and the temperature ran normal.

[@jaredkerstetter8875]

Small tip from my experience. Make sure not only the engine can breathe but the generator also needs to breathe. I learned the hard way.

[@berndmuffe5681]

We have used the kzbin.infoUgkxOTeIs0vv4_9B5hsmnLsk9r930uDQLu_Y for probably 30 hours with our camper and it’s been great! The noise level is really only noticeable when running the AC and other appliances like the microwave, hair dryer, or coffee pot. It’s not huge like other ones and it has wheels so even at 90lbs, I can move it!

[@catbird1759]

When we sat up generators years ago in the military, we used sand bags, the sound barrier should be built like the letter "G" and the top open. The opening should be facing towards any breeze that might be available. The sides should be slightly taller than the generator. This emits noise upward which makes it quieter. Heat is death for generators. If the generator doesn't have a sound barrier built around it, it is because it needs air. Just simply placing a barrier between you and the generator will cut the noise quite a bit. The materials that you used are excellent.

[@dantyler6907]

I was suprised to learn simple 4x8 sheet rock panels installed around a generator MASSIVELY reduced the sound!!! Simply lay the panels, one end on the ground, the other end on the generator. 4 panels takes care of almost ALL the noise. Cheap, solid fix!

[@reuven2010]

Uhhh... Aren't these AIR cooled ?

[@jacobdominguez8221]

@@reuven2010exactly

[@wes326]

How about just two 3'x3' sheets of 1\4 plywood, hinged at the top and the interior covered with sound deadening material, like a pup tent. Sound would still exit the ends but so would the heat and it would fold flat and provide some weather protection. Thanks for sharing.

[@jmcmahon1931]

adding a slight angle to the walls so the sound bounces down into the earth will help reduce the sound, you could also add in triangle sheaths onto the walls with your left over wastage, this will absorb more sound than just having flat walls.

[@MrFredsDIY]

Thanks for watching! A few months back I made a design with a slanted roof, this video herekzbin.info/www/bejne/f4vaXoFtr91pfcU

[@andrewkujawiak5388]

I'm more concerned with heat buildup. Cooking the generator is a big risk. Before I'd do this, I'd check temps at key point before and after putting this cover on.

[@MrFredsDIY]

Heat with generators is a concern. I did a thorough heat testing video for sound boxes. ➡️kzbin.info/www/bejne/iqqbkn1oes2Sjas

[@Ivel307]

Add a box fan

[@krafty9071]

Add a thermal disc inside connected to the kill wire,

[@Spoons89631]

Yeah it is an issue, My friend made one of these last summer used it on one of the hottest days of the summer to run his AC for an hour and it got so hot it swelled the gas tank and over heated the motor. Once it all cooled down he tried a box fan and it still was getting too hot and it really didnt help with sound all that much, he just ended up getting a much quieter inverter generator.

[@habana7638]

@@Spoons89631 Buy a 50 meter power cable, total silence guaranteed...😁

[@joelcrow]

I love KZbin... I was just thinking "I have to be able to build some simple box out of foam and wood to make this generator even quieter" and then bang here you are ;) Thanks for helping us out with this video, brother!

[@kcgunesq]

If I tracked your numbers, the difference was generally about 2-3db reduction. While most people will be able to hear a difference of 3db, it is very near the limit of discernment for most. No one will consider a dramatic reduction. Still, i love the effort and plan on watching your earlier versions.

[@radioace318la]

I dig your design. I built one almost exactly like yours. Being in broadcasting all my life I have heard what a difference sound-deading material can make. I lined the inside of mine with a product called sonex sound dampening panels used in radio station control studios. I had saved a bunch of scrap Sonex from a studio build. I had no idea at the time what I would use it for. glad I did. It works extremely well to dampen my RV generator. The only problem I ran into was the CO detector on the generator was very sensitive and would kill the engine if the wind was just right. I did a little tweaking with the box installing a small fan. Flat surfaces reflect sound in a big way. The Sonex (with a massive surface area) absorbs it like crazy. Thanks for sharing & Cheers from Louisiana.

[@MrFredsDIY]

Thanks for sharing your story! Your improvements to the design sound great!

[@spammerscammer]

You can only build a box one way. Lol

[@thenoneckpeoplerepresentat8074]

Hey Rick, would egg cartons work as makeshift sound baffles?

[@radioace318la]

@@thenoneckpeoplerepresentat8074 Absolutely. The cardboard type has more surface area than the styrofoam egg cartons. I have used them many times. And way less expensive than Sonex.

[@thenoneckpeoplerepresentat8074]

@@radioace318la Thank you, I appreciate the reply. I’m going to give them a try this summer at my camp.

[@bwfvc7770]

Dear Sir, I learned how to soundproof generator sets for the film industry. Your soundproof design is what I call, flat plane muffling. I built a generator, (120 kiloWatts, thats a turbo charged Cummins 6ctg, if I remember corrct), Mounted on a brand new truck, spankin' from the showroom, that on its first movie, was boomed up the side, by the fussy sound guys, microphone 3 feet away from the skin, with sensitive dialogue as they walked. The movie was Grampire, I don't know the local name to you but it was with Al Lewis as the Vampire. Al Lewis, such a cool guy, not that I'm insinuating a closeness. One day he talked about the car crash on car 54 with Fred Gwynne. That's all. I had always had an image of his credit on The Munsters. That crooked swerve of a signature. I got to work on a movie with him. He was the Best. Al Lewis is cool.

[@Brian.A.Simmons]

I did the same thing years ago. I neglected to make a video for it though. I built mine out of fire retardant drywall, and then put a thin layer of paneling on the outside for weather protection. The main reason I did drywall, is so the shed wouldn’t catch on fire. I initially built one out of wood like you did, but it didn’t seem to insulate the sound as well. I never tried foam though. Great idea!

[@RandomStuff-zt6qf]

This man is insane

[@weatherchaser1166]

Seen a few like these where they added a fan and an exhaust outlet. Seemed to work well too

[@lchope573]

Better make some tie down options bc I can see me chasing that thing all over the RV park at the NASCAR track on a windy day. lol.. :-)

[@jandblawncare8570]

Pretty big difference when in close quarters. I heard a small Cummins inverter/gen running a few weeks ago and you could barley tell it was on even walking right by it. We've used our Champion 3400 watt inverter / gen more this year than ever going to horse shows and found that there is a huge difference in sound level even as simple as making sure the gen is on the grass versus gravel roads.

[@brianw6645]

Brilliant. My only modification would be to design a bit of an angle on the roof so it would shed water when it is raining.

[@SecularMentat]

If you want to reduce sound further maybe staple or hot glue in some egg shell foam (or even cheap egg cartons on the inside to create some baffling. Seems like you've got the tools to actually test the volume pretty decently.

[@barrykelly2722]

You've given me ideas for sure. Love the portability. IMHO it still seems a bit loud so I'm going to have to research some. But you are out there testing and building and doing. That is more than I have done on sound reduction. Excellent build. Creative.

[@MrFredsDIY]

I am working on a slightly new design and will have a video soon! Thanks for watching!

[@royb.1441]

Decibel is a logarithmic scale. He made a solid improvement.

[@samson2968]

Lots of builds with MINIMAL sound reduction?? Good job!

[@MrFredsDIY]

Thanks for checking out the videos, my newest design is testing very well. Our initial test is a reduction of a decibels. Here is that video.kzbin.info/www/bejne/m6Okamdqlp51rMUsi=giahoGQUStGaVbnA

[@patrickhenigin4805]

Avoid flat panels that reflect sound. Avoid square corners Avoid parallel surfaces Utilize baffles and sound absorbing materials. A small amount of sound absorbent in a resonate spot can make a huge difference.

[@Dive-Bar-Casanova]

And direction change of the exhaust makes a big difference too. Can use pieces of that flashing to do that.

[@btaos1625]

Lol...maybe a dome shape?

[@debohannan4315]

Sir that foam board has a sound reflective coating , seams like if you wanted to reduce sound you might try something that absorbs it instead of redirecting it like fiberglass insulation or rock wool , heck that fiberglass insulation board used for air condition ducks would be a better choice with the aluminum foil on the outside But you are on the right track.

[@rodx5571]

I live off grid. I use generators when the sun dont shine (i am mainly solar). I put it in a trailer with wood sides. Trailer isnt safe fir the road anymore. I put a camper shell on top suspended by 2x4's. that was my solution.

[@joecool4656]

Try using a sound absorbing material that is non-flammable like fiberglass insulation or rockwool. A lot of the materials you used can reflect and conduct sound pretty well

[@Kevscancave]

Making it collapsible and with roof edging was a great idea! The camo color is super cool!

[@mshef140]

Instead of metal corners you could drill the styrofoam and glue in pvc sleeves for the bolts, and use bigger fender washers. That would be a lighter way. As some others have hinted, maybe line the inner side of each wall with 1" rockwool. Thanks for you videos 👍

[@meltallicaofficial]

This is a great idea, I put mine in an old little tikes play house. Covered it but seemed to amplify the noise

[@hokehinson5987]

Betting the fully enclosed foam box with the exhaust fan will win in all categories. Military used to put their 3.5kw set in a dug out hole at least a foot below surface. A pain to get on generator detail.all the noise and heat went straight up. Best that could be done in a tactical fld back in 80s. Been considering one of the kiddie tents. Cut out bottom. All of them are free standing with flex poles doing from corner to corner. Mostly interested in keeping out of rain. Have the genset on pavers plop the tent over it stake the 4 corners. And stores in a roll next to generator. Can see a need for the box though in camping ground situations.

[@MrFredsDIY]

Interesting idea!

[@SafetySal]

Nice video. The respirator cartridges you had on there were for particulates. You need organic vapor cartridges.

[@charlie-ux7nw]

I love your idea and simplicity, especially for when OTR. How about using a wide strip of painters tape for easy release rather than the metal. Maybe placing a board on the top to prevent the wind from moving it around. GREAT VIDEO! THANKS!

[@MrFredsDIY]

Thanks for taking the time to comment! I have another version that attaches in a more simplest way. Here is the video for that.▶️kzbin.info/www/bejne/f4vaXoFtr91pfcU

[@christittle1131]

If u want really kill sound u need dense product everyone agrees Sheetrock is great for this also have a box then a second box with some spacers strips giving 1 1/2” 2” gap between 2

[@hugh007]

Love the nichrome 'saw'. Nice neat cuts. Thanks.

[@MrFredsDIY]

Thanks for watching and commenting!

[@REVNUMANEWBERN]

EXCELLENT directions / instructions

[@DCS026]

I had the loudest generator on earth, it was a Coleman. I too tried to make a sound barrier, I rigged up a car muffler to it and it was still so loud it drove us insane. My solution? I bought a Honda. Was it expensive? You bet. Was it worth it. YES! It was so quiet, we were sitting outside of the camper and some asked if the generator died, we all looked around, we then noticed all the lights were still on. There is an old saying that I go by, "Buy once, cry once"

[@RimfireAddicted70]

Some other comments saw the design flaw as well. With an open end you will get redirected sound waves coming back as they bounce off everything. If you're making this for home use try adding a layer of reflectix barrier inside. I have it and its works great.

[@kevinreist7718]

Most newer generators have a Carbon Monoxide detection feature that shuts down the generator if Carbon Monoxide builds up, such as running it indoors. You may need to ventilate this "enclosure" to defeat this automated shut down feature.

[@dexterousx92]

*Great ideal. I need to make something like that*

[@doctorkayak]

I love the fact that so many people who own generators are going to do this and FRY THEIR MACHINES!!!

[@jav9888]

Why it looks like it gets enough air circulation ? space on the sides and the back.

[@Dive-Bar-Casanova]

Every time the exhaust sound changes direction it gets quieter. A few baffles that zig zag the exhaust made a big difference in the Noise level.

[@dangonzalez2585]

Thanks you have giving me some ideas on helping me reduce my noise issues.

[@dustup2249]

Good, helpful content on a subject that is important to dispersed campers who are forced to park 1 car length from the road in some state and federal parks which tends to result in campers crowding each other and causing stress over generator noise. This idea may have limited effect, but it is far, far less expensive and space saving than buying and lugging around solar panels, inverter-chargers and very expensive LiFeO4 batteries.

[@gordonwyant3469]

excellent job with presentation and simplicity plus instruction

[@MrFredsDIY]

Thanks for watching the video!

[@RayLacks]

Very cool!

[@Ivel307]

Love the walmart tools and the harbor frieght clamps 🫡

[@timt1406]

Good start. Add thick layer of mass loaded vinyl and retest. Look forward to results.

[@RG-wy1ol]

Thank you for making this video now I know I can definitely make this a DIY 👍🏽👍🏽

[@kittywilhite9583]

I'm not worried about sound since I only use my generator for a minute or two at a time. But I am wondering if this design would work for easy on off protection from the elements if I add a 4th wall and a pallet underneath. Like being under a giant cheap cooler.

[@codyschwoch5451]

Cheaper way of doing it is how the military does it and bury it in a box under the ground with a silenced muffler coming out, but this does definitely work better than it just sitting out in the middle of nowhere

[@nbookie]

A couple comments from my experience living on generators 24/7 for years. Lift the sound deflector an .5 to 1 inch off the ground to allow cool in hot out the top. Will not change your sound. Line the inside with carpet or welding cloth or "bag of rags". 100% coverage not required. Run a flexable exhaust line as far from camp as possible (up high in a tree or along the ground). Moving exhaust (and intake if possible) makes a HUGE difference. On some units it more than the sound box.

[@NelsonReyesJr]

BRILLIANT!¡!

[@pipoliveira]

It might be a bit expensive, depending on the thickness, but I believe one of the best materials is Cork sheets. Have to try it.

[@DakotaBoyzOffroad]

Your getting an echo off that bench. Plus the box design creates an echo chamber. Although the foam is a great insulator for heat, not great for sound proofing. Bolt some 3/8 rubber to the outside. Make a floor and put rubber on the floor section. Great effort. Try again.

[@efjefe]

As a actually engineer for generator enclosures. Like runs hospitals and city blocks. Air floor and exhaust is the the most important thing. Be wise of heat too. Your exhaust will get hot! Trust me. I know. Best thing if you are gonna be outdoors in quiet areas is to NOT run those things.

[@davidc6897]

The only potential issue I see is with the generator overheating since it is air cooled. You may be able to further reduce the sound with egg crate or other wool sound proofing inside the shed (would need to make it large to accomodate), or you can drape a heavy wool blanket over the top to further muffle the sound? Good luck on your quest and thanks for sharing. You already tackled some of the problem with generators with buying an inverter type that is probably 20-30 Dbs quieter than a standard generator.

[@mikehall7991]

yeah, no active ventilation (fan or something) which would help evacuate heat and provide fresh air to the intake...this is like creating an oven.

[@georgebadea4138]

All of them are wrong because you don't use acustic reduction materials; use 4m² of rock wool and that's all; it safer and cheaper; you have to let the air flow so the panels must be placed with space between them but without the machine being visible from the outside

[@Phuztone]

What did you line the inside of the box? It looks to be some sort of aluminum or steel sheets. Lining the inside would cut the sound a bit, but it will resist the heat of the generator, without it it may melt the Styrofoam. This is a great video! Thanks for taking the time to make it!

[@MrFredsDIY]

That is just a foil backer layer on the styrofoam. I am working on a new video with a slight change in design and with soundproofing! That should be coming soon, thanks for watching!

[@davidvickers8425]

I use cinder blocks. A pallet underneath with a steel shed door i was going to scrap. Both ends open noisy end pointing away from the house. And i have to open a window to tell if its still running. Cos its only for the fridge and freezer in power outages predator 6500

[@havfunwithit]

I put my generator with the back of it near a tree when camping. I thought having the exhaust aimed at the tree would help block some of the noise. It was about a foot away and still the carbon monoxide sensor shut the generator off.

[@robertduncan2742]

Try rubber sheets from McMaster in hardnesses then vent the cover both sides with intake and exhaust. Great ones on yours

[@PatrickPrice-ny2ie]

Nice Box! Dude is that my stepladder in the garage I loaned you 3 years ago? Lol!

[@fensterputzernuernberg]

A triangular design where just 2 pieces join together over it like a high roof might be a better option so to let air get in more efficiently

[@diyhvacguy]

The end of the video sums up my life at this point. Retake....sigh....retake hahahaha

[@MikeOrazzi]

Nice idea.

[@SunshineStateofMind1981]

Throw a mover's cloth over it, or a sound proof cloth over it to dampen the sound ever more I think. Great video.

[@vortexecho72]

Well done Good Sir

[@user-ef9ee8nx2m]

This video saved my business! We are food vendors on the powwow trail and they require a baffled generator. Chi Miigwetch for sharing this design!!

[@MrFredsDIY]

I’m so glad it helped you!

[@codybennink3339]

If you really want to make effective sound dampening, you should used a mixture of materials. Different densities of material will block different frequencies. If you line that with something like scrap carpet, it be more effective. I've got three materials for my compressor box.

[@HotGrandma2000]

You can find high heat MLV (mass loaded vinyl and stick it to any metal that vibrates around the motor. This will really dampen some of the noise as well. Like what they do with Fancy cars to reduce road noise.

[@MikeJordanUnCamplicated]

we need a numbers chart for all 3 boxes

[@multiTJboy]

Kudos for the simplicity of design and build but if you would do a little research you will find that material density is the key to sound isolation, and rigid foam is very low in density. Think of sound waves as vibration and rigid foam easily transmits vibration, very poor at absorbing it. Thump a piece of rigid foam with your finger and note how it will transmit the sound. Thump a piece of OSB or better yet, a piece of rubber mat and you will hear a dull thud because those materials are better at absorbing sound rather than transmitting it. A generator box constructed of proper materials would easily cut your dB readings down by 30 to 50%. Your box could easily be made more effective by attaching loaded vinyl or rubber mat to it.

[@emolasher]

I wonder how much a simple large cardboard moving box would compare, maybe even just set it down in a large box to see any difference. Other things to try could be set the generator up in a bowl with 45 degree angled sides so noise is reflected up. Heat would rise easily too.

[@louisp.3332]

The only improvement I did was I used U channel at Lowe’s and permanently attached it to all sides. So then all I had to do was “slide” all the pieces in place to assemble and disassemble was just as easy. No bolts no washers just easy Peezy :)

[@leehyer4916]

I was thinking go over the outside with plywood, put a hole in the back with a fan and put a couple smaller holes in the front so the air can flow Also, maybe put like a vent cover over the two holes maybe make the plywood box a little bit bigger and then you could have the vent holes not in line so it kinda keeps the sound in that way does it make sense?

[@MrFredsDIY]

Thanks for commenting! I recently finished a design similar to what you are describing. You can find that video series on my KZbin channel.

[@cindyreid6404]

Why didn't you use sound shield? You cut them to size and have an adhesive back. Worked great for my outboard engine inside the cowling.

[@ef2967]

Maybe by a quiet generator. I have a honda 3000 watt and when in eco mode it is pretty quiet with no need for what you are doing.

[@leedchristensen]

Glue some egg carton foam on the inside four surfaces

[@HJ51773]

get a small car muffler and engineer a quick disconnect on your genset with flexible exhaust pipe to the muffler. you seem to be mechanically inclined so it shouldn't be a big deal. it will be much quieter and take up less room. i've done this with an 11hp kohler cast iron engine on a homebrew log splitter and it is unbelievably quiet

[@kathyweigelhi-lophotovideo2984]

Thanks !

[@1951pwaitzman]

Great Concept Going with that for sure? Question though ... Would placing the reflective side on the outside provide a additional protection from he elements? Or is placing it on the inside preferred? Thanks for the video!

[@MrFredsDIY]

My understanding is that both sides are foil-faced and one side is painted. I put the foil side, facing inward to help reflect heat back in the winter time. Thanks for watching.!

[@paule3321]

Does this box have any problems with generators with a carbon monoxide shut off sensor?

[@MrFredsDIY]

Our generator does not have a co2 sensor so that is a good question. Thanks for watching!

[@toliadis]

Super

[@groth3395]

sound vs heat....putting the generator in a Styrofoam box traps heat does it not?

[@daviddavids2884]

information. good work. (people should use one of these things when they HAVE to use their pressure washers, around the house.) your results suggest that the use of foam sheet, with very minimal bracing, does not result in a sufficient amount of rigidity; so that re-radiation of sound by the structure is minimized. as desired, additional bracing, in the form of a diagonal-X, could be firmly attached to each panel. made of (precisely joined) pieces of 1x2 or similar.

[@mega-hb4re]

You can't put a cover in the front or you are cooking that generator that's why it wasn't much difference

[@KINGSTONSPRIDE]

Do the test with a loud generator. Thank you!

[@shoottrue5115]

I bet sound dampening panels would be even better

[@metskipper]

2" pink fiberglass is the best noise supressor. Funny no one seems to know. I used a cardbord box lined with it as a test box for my reloads. No need for ear muffs. Styrofoam on it's own is the worst.

[@SebastianDra]

Would it be possible to cut tongue and groove into the styrofoam to get more stabilisation into the box or even get rid of the metal?

[@MrFredsDIY]

Perhaps that would work. I’m finding the more times I set it up the metal actually does a pretty good job. Thanks for watching the video!

[@jasonschaeffer72]

Line the inside with soft egg create foam

[@raterNAZ]

I may try this to quiet down a somewhat noisy pool pump... any thought on doing this?

[@MrFredsDIY]

For a pool pump, maybe you could do something out of wood and make it smaller. Perhaps something like the one in this video but without the fan.kzbin.info/www/bejne/jZ_CeHlnh7aipdksi=On7VKGOQH856Rso2

[@Someone-rb8go]

Great idea, I’m going to make something similar but with hinges so it folds flat when not in use

[@MrFredsDIY]

Good luck with your build! Here are some ideas kzbin.info/www/bejne/m6Okamdqlp51rMUsi=D8pZnVw6BqHpbedp

[@Randy-ul5hy]

Angling the sides so that the noise generated is directed into the ground seems to be the key.

[@StagArmslower]

I used chest freezer which died and when I put it on its side, I could fit my Champion 2200W inverter with the exhaust to the outside. It worked fine but my wife said it looks ghetto like and I had to remove it

[@MileyonDisney]

Cool design. I'm thinking that if you could angle the sides downward (like the sides of a pyramid), it would deflect the sound into the ground, instead of bouncing back and forth. Also, if you put 2" wide strips attached inside, those would serve as baffles, too. I do not know about any of what I just said. I'm only thinking of how it works when recording audio. How fireproof is that material? The generator backfires and starts a fire - might not be too good. Again, I do not know.

[@MrFredsDIY]

My guess is that the styrofoam would melt long before it would catch on fire. I am working on an angled roof design video with s few upgrades! Thanks for watching!

[@god-tx4xz]

Make sure you use fan/fans to ventilate the box or the compressor will only last a fraction of its expected life.

[@Mr.Fotingo-qf9hk]

I would make the top panel in a way so water just won't puddle up top.

[@MrFredsDIY]

Great comment! My newest design accounts for rain water drainage. Here is the build video kzbin.info/www/bejne/m6Okamdqlp51rMUsi=OLVDTxYsI28A0CcR

[@theloosemoose8200]

Just weld up a suppressor exhaust.. these are air-cooled so restricting air will eventually kill that engine..

[@SecularMentat]

I think you could get away with it being completely collapsible with aluminum duct tape. There's a guy that builds temporary housing with insulation like this. And it folds up and fits in his vehicle really easily.

[@mikelong9638]

Nice simple design, but you might want to weight it or stake it to the ground if any chance of a wind.

[@Mteixeira91]

seems like a lot of work to me just for lowering it by two decibels At zero feet. in my opinion if you got another piece of 2" styrofoam and put it on the back, it would lower it quite a bit. also extending the muffler pipe will lower the decibels quite a bit too .