Sound Dampening Idea (maybe)

[Belleville_Boater]

There has been alot of discussion about sound dampening lately it seems. There have been some great solutions (some potential but sound promising):

1) Buy a new 24'er
2) JBP is coming out with a new sound dampening kit that could be very promising.
3) Many DIY ideas that seem to have been successful (you'll have to read them in the forums, it's worth the read)

I have a friend who plays drums in a band (bare with me) and he has a family who does NOT love listening to him practice. He had done much research in sound dampening a room in the house and found that if you line the walls with egg cartons that it substantially lowered the noise to the point where they could barely hear it at all. I have not witnessed it first hand but he's not one to be a big story teller so I tend to believe him. Now i'm not saying it would look pretty inside the engine compartment but does anyone know this theory to be true?? I have done minimal research on it but sounds logical based on how it redirects sound waves. Love to hear everyone's thoughts on this?

 

[MikeyL]

There has been alot of discussion about sound dampening lately it seems. There have been some great solutions (some potential but sound promising):

1) Buy a new 24'er
2) JBP is coming out with a new sound dampening kit that could be very promising.
3) Many DIY ideas that seem to have been successful (you'll have to read them in the forums, it's worth the read)

I have a friend who plays drums in a band (bare with me) and he has a family who does NOT love listening to him practice. He had done much research in sound dampening a room in the house and found that if you line the walls with egg cartons that it substantially lowered the noise to the point where they could barely hear it at all. I have not witnessed it first hand but he's not one to be a big story teller so I tend to believe him. Now i'm not saying it would look pretty inside the engine compartment but does anyone know this theory to be true?? I have done minimal research on it but sounds logical based on how it redirects sound waves. Love to hear everyone's thoughts on this?

#1 (above) is PROVEN successful. Dramatically so.

 

[Belleville_Boater]

@MikeyL Ohh definitely!! but I was referring to if anyone knows about the egg carton theory being successful. Maybe something that us 21'ers and 19'ers could come up with a great DIY if the theory holds water (no pun intended).

 

[BoaterGuy]

Ohh god... this is going to be a long thread.

 

[Belleville_Boater]

Ohh god... this is going to be a long thread.

LMAO possibly... I hope that's not a bad thing.

 

[GTBRMC]

There has been alot of discussion about sound dampening lately it seems. There have been some great solutions (some potential but sound promising):

1) Buy a new 24'er
2) JBP is coming out with a new sound dampening kit that could be very promising.
3) Many DIY ideas that seem to have been successful (you'll have to read them in the forums, it's worth the read)

I have a friend who plays drums in a band (bare with me) and he has a family who does NOT love listening to him practice. He had done much research in sound dampening a room in the house and found that if you line the walls with egg cartons that it substantially lowered the noise to the point where they could barely hear it at all. I have not witnessed it first hand but he's not one to be a big story teller so I tend to believe him. Now i'm not saying it would look pretty inside the engine compartment but does anyone know this theory to be true?? I have done minimal research on it but sounds logical based on how it redirects sound waves. Love to hear everyone's thoughts on this?

Please accept my apologies, but I don't intend to bare with you in any way, shape, or form!

 

[Belleville_Boater]

Please accept my apologies, but I don't intend to bare with you in any way, shape, or form!

LOL sounds good, I appreciate your input.

 

[motorboater]

Like this? http://www.mcmaster.com/#9710t95/=wkwjl6

 

[Belleville_Boater]

Like this? http://www.mcmaster.com/#9710t95/=wkwjl6

Ahhhh yes! Hmm I should have thought to look at Mcmaster, GOOD CALL!

 

[motorboater]

I dont eat enough eggs to use actual eggcrates!

 

[motorboater]

100 pairs for $31.80! http://www.mcmaster.com/#hearing-protectors/=wkwrtt

 

[scokill]

I recall reading that just applying some sort of material to the engine compartment has minimal benefit, but to some minimal may be worth it. I recall the most success was doing the engine compartment and the underside of gas tank hatch.

 

[Belleville_Boater]

Not sure how the dampening numbers compare to other DIY material but found Quilted Fiberglass Absorbers - Outdoor Weatherproof for very similar situations such as reducing motor noise.

http://www.allnoisecontrol.com/noise-control-data-pdf/Sound-Blankets-Outdoor-Weatherproof.pdf

 

[Belleville_Boater]

100 pairs for $31.80! http://www.mcmaster.com/#hearing-protectors/=wkwrtt

I'm pretty sure my wife owns stock in them, can't do anything without being handed a pair. Unfortunately not only would they drown out the engine noise but speaker noise as well...

 

[MikeyL]

I recall reading that just applying some sort of material to the engine compartment has minimal benefit, but to some minimal may be worth it. I recall the most success was doing the engine compartment and the underside of gas tank hatch.

@skokill ............ Everything you just wrote was SPOT ON !
EXACTLY. Point for point. Thanks for sharing. And Happy Easter to you & yours coming up !
Mikey Lulejian - Lake Oconee, GA

 

[GTBRMC]

I have done a fair amount of research on this subject. Many have spent a lot of money, a lot of effort, added significant weight, and not had appreciable results. Others have been very pleased with their efforts.

I do believe the best noise reduction in terms of $$$ vs. effort vs. impact was the fairly simple and very inexpensive gasket/seal work some have done around the engine hatch perimeter.

I have the initial YJB thread bookmarked on iPad at home (will add it here later), and I have not done it yet, but I did do a temporary proof-of-concept with about $6 worth of foam pipe insulation slit lengthwise late last boating season and got a very big thumbs up from all of my crew including my wife.

Edit: YJB link...see member pwb's posts & responses...http://yamahajetboaters.com/forum/viewtopic.php?f=1&t=50166&p=407004&hilit=Noise+reduction#p407004

 

[MikeyL]

I do believe the best noise reduction in terms of $$$ vs. effort vs. impact was the fairly simple and very inexpensive gasket/seal work some have done around the engine hatch perimeter.

EXCELLENT observation. Easy, inexpensive and well-worth the effort. Mikey nods in total agreement !

 

[scokill]

I have done a fair amount of research on this subject. Many have spent a lot of money, a lot of effort, added significant weight, and not had appreciable results. Others have been very pleased with their efforts.

I do believe the best noise reduction in terms of $$$ vs. effort vs. impact was the fairly simple and very inexpensive gasket/seal work some have done around the engine hatch perimeter.

I have the initial YJB thread bookmarked on iPad at home (will add it here later), and I have not done it yet, but I did do a temporary proof-of-concept with about $6 worth of foam pipe insulation slit lengthwise late last boating season and got a very big thumbs up for all of my crew including my wife.

That has to be a no-brainer worth a try!

 

[dan144k]

I was looking at the egg crate idea the past few years too, would need to be temperature and moisture resistant. Have not done anything other than look and explore. I was looking at mcmaster carr too. Was hoping some else would figure out ultimate solution and then I could just duplicate. Seems to be several sound products available, many with different materials and density's.

Also with my boat
1. I added rubber bulb under engine hatch to seal it. HUGE improvement for $30.00.
2. Also when I changed to solas impellers, the engine note and harmonic changed for an improvement.
3. I also found the side panels between engine and under seat storage, were loose with gaps, added (I think) piece of 1"x 1" lumber 12"? long to fill gap and secure panel, Which helped with noise also.
4. I think their is a lot of resonance noise from the upper part of the stern, between the upper and lower swim decks. When I added speakers I think I reduced the resonance some, but that was a panel I was looking at being important to do.

Any body experiment with?
1.Producing the opposite sound waves to cancel the noise. I have read some cars do this now to make interiors quieter.
2. Does seadek or dekadence flooring compared to carpet make boat any quieter?

 

[BigN8]

I've heard if you cover the hull with fat mat sound deadening material that the sound is much less!