Soundproofing Car Engine Noise - Before & After!

In this video I will be sound deaden engin bay of my Toyota Tundra. I will also be using a decibel meter to determine how much noise was reduced after sound deadening the hood/bonnet of the car.
I will show you step by step How to apply a sound deadening mat to your hood. The sound deadening material I use in this video is from Canopus. Links to the products I used in this video bellow. You can choose between black and silver within each link.
Here are some of the soundproofing material I recommend. These are affiliate links that gives me a commission at no extra cost to you. Thank you for supporting my Channel!
MY AMAZON STOREFRONT - amzn.to/47kB5gr
1. CANOPUS Car Sound Deadening Mat, 80 mil 18 sqft - amzn.to/3vemRO0
2. CANOPUS Car Sound Deadening Mat, 80 mil 10 sqft - amzn.to/39gYA1x
3. CANOPUS Car Sound Deadening Mat, 80 mil 5 sqft - amzn.to/3rRhuCt
4. Rolling Applicators - amzn.to/3kQYtjk
5. Degreaser For Cleaning Surface - amzn.to/3IVBICC
6. Cleaning Rags - amzn.to/3mmw8BH
You can also visit their website www.canopusgroup.us/products/...
Visit my website soundproofguide.com for more articles and information on how to soundproof your car and sound deaden your vehicle DIY.
Here are more videos regarding car soundproofing and vehicle sound deadening material test and car soundproofing before and after.
How to Make Windshield Wipers Stop Squeaking - 6 Ways! - • How to Make Windshield...
Bear in mind that some of the links in this video are affiliate links, and if you go through them to make a purchase, I will earn a commission at no extra cost to you.
Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational,​ or personal use tips the balance in favour of fair use.
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[@soundproofguide]

Here's everything you'll want to know about soundproofing your vehicle - soundproofguide.com/how-to-soundproof-a-vehicle-step-by-step-diy-guide/

[@michaellyda7460]

I was wondering if you have any ideas for doing similar to a UTV? So that people can communicate inside the cab while traveling on the trails.

[@soundproofguide]

@@michaellyda7460 I will look into that! Thanks!

[@tronmcrae]

Best part of this video was watching how clean you got the underside of the hood.

[@soundproofguide]

Haha It definitely took a while!! Thanks!!

[@tgriebe]

Normally the under hood absorber is a molded fiberglass product intended to absorb higher frequencies. The mass loading and damping is done on the firewall itself and inside with the dash absorber.

[@pauloalmaden]

Just what I was looking for. Thanks for this

[@lohengrinknight]

I did the same on the hood of my truck. My readings at 65 mph on the same road before and after installing butyl sound deadener were 71 and 69.5 db. So far that's all I've done, but I'm planning on doing more things to bring the db reading to 67. That's my ultimate goal with a US$ 200 budget.

[@bigspence6898]

So did you notice a difference after doing just the hood

[@lohengrinknight]

@@bigspence6898 yes. It's a big difference. I'm going to use mineral wool now to make the good even more soundproof.

[@ThePupil]

If you have access. Removing the lining between the rear of the engine bay, add butyl and place the liner (or plus extra foam) back. Other big improvement is wheel arches.

[@lohengrinknight]

@@ThePupil I just don't know how to tackle the wheel arches

[@PabloGonzalez-io6pq]

Nice video! Just a quick comment: A 3dB difference does not mean "half" or "double" the sound perceived by a human, which is around a 10dB difference. 3dB applies to amplification power, since in order for an audio amplifier to produce an extra 3dB, it needs twice the power.

[@soundproofguide]

Yes you're right! Thanks!

[@abc33944]

great job on these videos !

[@Ella-gb3rj]

I can't believe the difference in engine noise after soundproofing my car! It's so much quieter now and makes such a big difference in the overall driving experience. Highly recommend giving it a try if you live near a busy road or have noisy neighbors. 🚗💤 #soundproofing #engineNoise #quietCar

[@shawng7902]

After only using a little so far, this is one of the best products you can add to a vehicle. I have an older chevy silverado LTZ. Has the same interior as the Denali of the same year. 3 full sheets so far have made such a dif it's hard to explain. Mine has a huge hood mat under it. The firewall would make a diff as much as anything. You could literally throw a couple scrap pieces on a panel and kill the ring in it. That's why OEM does that. 1 square on a roof skin will kill the whole panel. learn how much coverage you need and how much starts diminishing returns. You will waste a ton you don't really need. It doesn't work like those foam blocks in a sound booth. ITs made to stop the panels from becoming a speaker itself.

[@Kj4real]

I’m going to put this all over my rsx cause it’s load for me… gunna put some on the rear too aroud the ties

[@lohengrinknight]

Since you know a lot of soundproofing materials for home purposes, which products do you think would help to bring down the dB's if installed inside the doors and on the back wall of a pickup truck. The sound deadening mats and foams available for vehicles really don't seem to cut that much noise and are very expensive. I'm not sure if there's a wooly material for homes of about 0.5 in thick that could be glued onto the metal to help reduce noise. Thanks for your videos.

[@Jeff-0621]

Thank you for that. Going to try it out because I didn’t realize talking on the phone that’s outputted to the car speaker will allow everyone outside hear everything. Even at low volume.

[@soundproofguide]

Yes definitely! Let me know how it turns out!!

[@JesusisLOVEJohn-]

How did it turn out?

[@nuntius1]

@A. Melbs i'm dead

[@jasjeet30]

one question: why do you cut the sheet instead of using whole sheet?

[@melaniezette886]

You must lower 10 dB to feel twice lower. Nevertheless dampening vibrations where the ear is most sensitive is essential. You have to analyse the sound. The most important is what you feel.

[@gabet3754]

What if you just cover the whole under part of the hood?

[@kingofmonsters7452]

At this point plugging your ears is cheaper 😂

[@GF-mf7ml]

Race car bro!

[@drewnelson9249]

Thanks for this! Will Noico work under the hood as well? I just applied it on my trunk last weekend and looking to use the remainder of the materials. I have about 12-15sq feet of material left

[@soundproofguide]

I'm not sure. There are different types of Noico and some does work under the hood. Check for the exact one you have on Amazon and if it doesnt say it in the description you can usually find the answer at the bottom of the page Q&A.

[@gikaradi8793]

is flex seal a good alternative ??

[@waterdripsmusic]

dB SPL levels aren't calculated this way. Twice as little power = -3dBm, twice as little voltage = -6dBV, but in this case you're actually measuring SPL (sound pressure level), human percives "half as loud" as = -10dBSPL. So difference measure here is actually small.

[@deckard6_634]

moving the meter away from the windscreen and pillar to the centre lowers the reading.

[@PiRXa]

Hi there! Interesting video, just wanted to add my two cents. For measuring the impact of deadening under the hood, you might actually want to measure noise level in standing car, just revving the engine up to reasonable rpms. At the 100km/h speeds road/wind noise probably is stronger than engine noise and you won't notice gains unless your cabin is already deadened.

[@soundproofguide]

Great feedback! Thank you! 😊

[@kafklatsch3198]

​@Slybabyfox...agreed, all else being the same ( cabin ambient environment), the difference would be caused by the single change.... that change is the subject of the video..

[@kafklatsch3198]

A second layer covering the entire hood the result may have improved the results even more..... thanks

[@theclutchtimesquad7476]

Seems cool, but feel like it’s important to hear your engine. Auditory ques are key to maintenance

[@soundproofguide]

Makes sense.

[@grizzlymetalworks8867]

Did he use a dba or dbc meter

[@joshjenkins3815]

Now do this with a 12v Cummins!

[@danbell3378]

Can you also cover the firewall with this material?

[@GF-mf7ml]

Yes you can

[@TheAnonymost]

75 decibels. thats my humvee at idle! need to sound proof!

[@SaycoPworrell]

Need to mount that dB meter correctly to make this a genuine test and compare. Mount it at the center

[@soundproofguide]

Good point!

[@BCToby]

FYI these are not 80mm thick, they are 2mm thick or 80mil (80 thousands of an inch.)

[@bbanks1019]

The majority of the sound comes from the underside of the vehicle. It reflects off the ground into the cabin.

[@limamantapachitas]

I think is time to change the PCV , there is too much oily coat on the hood, no to mention on the engine

[@RainZen19]

Can you make a video on how to sound proof a Tesla Model 3, so much road noise I feel like I'm inside a drum. And I put dynamat on all the doors and floor, didn't help much.

[@soundproofguide]

Interesting! I’ll look into it. I don’t have a Tesla handy but could definitely do some research about if electrical cars should be done differently than conventional vehicles for better soundproofing.

[@tomhalf3018]

Don't buy cheap tires or ask for softer thicker tires.

[@christoo5125]

Buy better tyres.

[@ozzie3056]

Tires and also if you have the bigger rims with low profile tires that would make a huge difference. Michelin makes excellent quiet tires

[@briank10101]

Drive only on new asphalt roads and drive downhill so engine load and rpm are kept low 😃

[@porscheguy09]

I’m questioning the claimed thickness of this material. 80mm is over 3 inches thick which this material clearly isn’t. I think each piece is probably 8mm thick not 80mm.

[@emilz85]

80mil (not mm) is 2mm. About right for the hood, I used the same thickness. Otherwise it can get too heavy and fall down. Effect was noticable, after doing the hood, the most noise came from under, front of the car and from the front wheelarches. America, switch to the metric system already.

[@porscheguy09]

Except he says specifically about 39 seconds into the video that it’s 80 millimeters thick.

[@emilz85]

@@porscheguy09 it clearly isn't

[@rayafk8502]

@@porscheguy09 probably just misspoke

[@jamesmccarthy6743]

He just thinks that “mil” stands for millimeter, it doesn’t. That’s a common misconception. “Mil” is actually its own measurement category. We use it in automotive painting to illustrate the thickness of paint.

[@LOUTED]

me with a straight piped G35

[@ckrico9588]

Is this the same quality as dynamat or second skin? Which one would you choose

[@TheBoofGod]

I would choose second skin

[@Fw8888]

Late to the party… but one deadly question: will the sound absorption convert into heat, and make your car front part overheat?

[@User-cb4jm]

No. Your hood barely takes any heat away from the engine even with bare metal (it’s never gets hot), it’s dissipated via the radiator and cooling fans and the grille on the front of the car. The hood isn’t a part of the cooling system design.

[@jamesbuckle6077]

​​@@User-cb4jm I have steam rising from both my hoods when stopped, so not quite true. But I agree it won't make any noticeable difference to the engine. Especially not while moving.

[@wojciechmazurek947]

Hi! Why didn't you cover the whole hood but just the gaps? Is the difference in outcome too small to bother? And why is it common to proof just the hood but not the cockpit? Simple reasoning would be that noise is made by engine, there is a wall between driver and the engine, so the wall should be deadenend.

[@emilz85]

No point adding deadening to areas which are structurally solid. The gaps are thinnest, so they resonate, making noise. deadening thin metal suppresses that.

[@mrhyde7019]

Coverage of at least 25% is enough for significant results, in addition to what @emilz85 said.

[@mountains1233]

How may dB difference on average would you say it was?

[@soundproofguide]

About 1.5 db. Which is really good considering how easy it is to apply and how little you need.

[@kaganadair2084]

@@soundproofguide Would it be better if you apply it to the whole surface?

[@pyaephyokyaw9898]

@@soundproofguide how about the outside of engine hood? Did u measure?

[@Artoconnell]

Flammable? the OE blankets are made to fall and smother an engine fire, those look like they will excite a fire.

[@Flassh81]

I need to deaden a Lot on my 2012 sienna. Music and conversation at 60+ are almost pointless unless I'm willing to wake the kids.

[@mountains1233]

By what mechanism does this work?

[@soundproofguide]

Could you rephrase the question…

[@mountains1233]

@@soundproofguide Does it absorb the sound or vibration, deflect it. I'm trying to understand how it lowers the noise or vibration? Does it basically act as an anti-vibration pad that you'd put on the legs of a refrigerator?

[@tgriebe]

When sound waves hit the sheet metal, the metal vibrates and rebroadcasts the sound, like a speaker. The material he applied flexes with the sheet metal and turns that motion into heat thus providing damping. The material also adds mass loading, which reduces the amount of deflection and in turn the rebroadcasted sound.

[@-WolfMan-]

You need to attack that Roof - Total Coverage. It'll change your World completely.

[@soundproofguide]

Next project! Thanks!

[@318RG]

im in arizona hot hot hot, would this mess my car up?

[@mojomojo5779]

In Arizona, if you are concerned about the heat melting the soundproofing off the hood, which could happen even with butyl, remove your seats and carpet and door panels and soundproof those surfaces instead

[@TheSkepticSkwerl]

why does everyone say "ash-phalt" it's asphalt

[@antonis4472]

Does anybody know if a plastic engine cover helps deaden engine noise?

[@soundproofguide]

Probably will make it worse if it starts to rattle

[@antonis4472]

@@soundproofguide Thanks

[@Avalontranslations]

8(eight)mm not 80-eighty

[@gabedaxe477]

Just get house insulation lol

[@elelegidoriginal]

No, lol - that material is not 80 millimetres thick. "80 mil" means 80 thousands of an inch - it has nothing to do with millimetres.

[@soundproofguide]

Omg I did get that wrong. Thanks for pointing that out! 😊

[@jleigh535]

Why do they use mil in imperial?

[@lkjyuiop1987]

I’m putting it in my car so I can have better sound from subwoofer 🔊. Don’t ya got any bass Don’t be poor

[@justice4all32]

The human ear cannot determine the difference between 3 decibels

[@CanadaRulez4Ever]

well, turns out to subjectively notice the noise changed 2 times, it is 10dB rather than 3dB. From what I've seen so far it turns out that if you want a quieter car, buy a well built on the end of luxury car where all sound reduction and deadening was done by design and by the manufacturer. Everything else is just a waste of time, materials and money.

[@hctim96]

why-do-you-pause-between-words-like-you-are-scolding-a-child-?

[@seveleleventwelve]

1 to 2 dB is not worth the effort and money. Waste of time.

[@soundproofguide]

Not true, if you reduce the noise by only 3 decibels, you’re cutting the noise in half from what a human can hear. When knowing that, 1 and 2 decibels can still be significant. Thanks for your feedback.

[@emilz85]

Depends who you ask. Some people don't notice the noise, others do. If you have a car which you like and will keep for a long time, but noise is an issue, it's definitely worth doing. That said, doing just one bit will not bring spectacular results.

[@kevintomb]

@@soundproofguide actually 10 db is half. 3db is a small but noticeable difference.

[@amtra1778]

it was a few patches of deadener. If you apply different layers for different frequencies even just in the trunk it'll lower it even more. Moreso if you tackle the hood and roof if not the entire car interior.

[@briank10101]

put ear plugs on

[@johnnylong6289]

Typical Tundra owner...