I am not completely sure if this is the appropriate place for this post or not. However, I am in need of some advice.
Recently I noticed that the bass in our vehicle will make a rattling type noise if the volume is turned up too loud. What is causing this & how can I fix it?
It's called resonance, where panels will start vibratng. Supposedly they make some sort of stick on insultors that help stop some of the resonences, but I'm not a heavy duty car audio expert either. I just know the car's sound like shit when they cruise by my house
audioaudio90 Messages: 623 Registered: October 2010
Illuminati (1st Degree)
Nymeria wrote on Tue, 25 September 2012 08:11
This is one of the major issues I have with car audio. It seems that everyone I've ever ridden with thinks that rattling sounds good.
Yes! This has been my complaint as well.
Equinom, you can purchase sound deadening material designed specifically for car audio. Installing it requires you to remove interior panels, so you'll need to be comfortable doing that or paying someone to do so.
VoigtClub Messages: 15 Registered: October 2012 Location: Cambridge, MA
Chancellor
Yup, resonance. At those lowest "felt not heard" frequencies the pressure in the vehicle is yanking and popping the thin metal walls of the car 18-25 times a second.
The main product line for combatting panel resonance is called Dynamat, which is a tar-based tile that adhere's to the inner car body and dampens it through both mass and viscous resistance.
If only every DIY installer understood that your car isn't supposted to fart and installed some dynamat, I'd be much happier about those bass-head idiots cruising by.
If only every DIY installer understood that your car isn't supposted to fart and installed some dynamat, I'd be much happier about those bass-head idiots cruising by.
Haha! It's good to know I'm not the only one who gets irritated. That rattling sound really sets my teeth on edge. I can't understand why so many people apparently like it.
It's not necessarily resonance. If the speakers have a higher wattage rating than your amp, this will happen no matter how well you shield your speakers and wiring.
Wayne Parham Messages: 18786 Registered: January 2001
Illuminati (33rd Degree)
No, it has nothing to do with the "wattage rating" of your speakers or your amp. It has to do with the amount of acoustic energy and the structural integrity of the car.
Bill's right, at certain frequencies, it takes less power input to create a particular kinetic power level. At those frequencies, the structure (or part of the structure) vibrates strongly with relatively little energy input. That's where the car is most vulnerable.
Personally, I find it annoying. Cars are just a couple cubic meters, so it doesn't take much power to bring them to insane SPL inside the car. But when it makes all the panels vibrate and rub against each other, they sound like shit. So what's the point?
Fannie Messages: 15 Registered: September 2013 Location: Alabama
Chancellor
I have to agree, Azuri. In my neighborhood there seem to be a lot of people bent on being noticed. The more annoying they can be the more they seem to like it.
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