Silentwave Soundproofing

no, but as a matter of principle I'd ignore this product and probably the whole company.
Two pages full of carefully crafted words and few pointless numbers thrown in. ISO mentioned, etc, saying absolutely nothing about the product.
They may have a v.good marketing dept, but we have no idea what the product is like.
 
Noise reduction works by either blocking the path between source and listener or by absorption in an enclosed space where the acoustic energy is converted to heat.
Good quality, as thick as possible, barrier mat is a very good solution in a boat. It reduces transmission through a wall and also within the engine compartment.
The implication that covering everything in Bacofoil will give any sound reduction is ludicrous. Fire protection maybe. Not a good choice of picture - the marketing department must think that if it's shiny it must be good.
Saying it achieves up to 6dB reduction is a negligible reduction. A change of 2dB is barely audible and 3dB just detectable by most people. 6dB is a very poor change..
 
Interestingly, when I asked them (Siderise) for more information about SilentWave they simply referred me to their distributor Halyards.
 
Montemar said:
Noise reduction works by either blocking the path between source and listener or by absorption in an enclosed space where the acoustic energy is converted to heat.
Good quality, as thick as possible, barrier mat is a very good solution in a boat. It reduces transmission through a wall and also within the engine compartment.
The implication that covering everything in Bacofoil will give any sound reduction is ludicrous. Fire protection maybe. Not a good choice of picture - the marketing department must think that if it's shiny it must be good.
Saying it achieves up to 6dB reduction is a negligible reduction. A change of 2dB is barely audible and 3dB just detectable by most people. 6dB is a very poor change..
Click to expand...

while i agree that their product sounds pants and tinfoil won't help you're quite wrong on the db adjustment as dB scale is logarithmic eg a jump from 10dB to 20dB is not a doubling of the volume but 10x more volume so a 6dB decrease is potentially massive. For example once you're in the 100+ dB range then 3 dB increase is double the volume.
 
hinch said:
while i agree that their product sounds pants and tinfoil won't help you're quite wrong on the db adjustment as dB scale is logarithmic eg a jump from 10dB to 20dB is not a doubling of the volume but 10x more volume so a 6dB decrease is potentially massive. For example once you're in the 100+ dB range then 3 dB increase is double the volume.
Click to expand...
What’s over 100dB got to do with it?
Yes it is logrythnic. But double the distance and you halve the volume. A 6dB reduction.
Move from 1m away to 2 m away from your noise and you can’t tell much difference in volume. So montemar is right. That’s why it’s a logrythmic scale. Our perception of volume isn’t linear.
 
Elessar said:
What’s over 100dB got to do with it?
Yes it is logrythnic. But double the distance and you halve the volume. A 6dB reduction.
Move from 1m away to 2 m away from your noise and you can’t tell much difference in volume. So montemar is right. That’s why it’s a logrythmic scale. Our perception of volume isn’t linear.
Click to expand...

the point was his last line is actually wrong
A change of 2dB is barely audible and 3dB just detectable by most people. 6dB is a very poor change..
Click to expand...
6db could potentially be quite a large change especially in an engine room i'm pretty certain 2x diesels on full chat is well north of 100dB. so a product providing a 6dB reduction could be quartering the volume potentially when external and measured from the same distance.
still not saying the product is a) capable of that or b) any good though without testing it
 
hinch said:
the point was his last line is actually wrong 6db could potentially be quite a large change especially in an engine room i'm pretty certain 2x diesels on full chat is well north of 100dB. so a product providing a 6dB reduction could be quartering the volume potentially when external and measured from the same distance.
still not saying the product is a) capable of that or b) any good though without testing it
Click to expand...
Quiet life 45mm is 29dB reduction at 500hz. 6dB is useless.
The frequency of the reduction stats needs to be known too. Lower frequency is harder to reduce.
 
Elessar said:
Quiet life 45mm is 29dB reduction at 500hz. 6dB is useless.
The frequency of the reduction stats needs to be known too. Lower frequency is harder to reduce.
Click to expand...

indeed which is why you go for high density vibration deadening on the low frequency sounds rather than air gap foam. low frequency is also omni directional where are high frequency less so and carries less energy usually so easier to mute.
 
My meagre under standing after reading around the subject and specking added sound proofing to my ER and the geny sound box , is add a different material and make sure it’s air tight the hatch seals .Also leave no gaps .
Obviously you can’t close the hull side ER air vents .

So if OEM is foam based add thick metal + dense stuff and vv .Seems to have worked.
 
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