Sound Deafening?
#11
12-30-2010, 01:00 PM
There's nothing theoretical about it, though it has to be termed correctly. A full sound deadening treatment raises the "perceived" SPL levels. This is quite simply a product of lowering the noise floor in the vehicle. Say for example, the general noise inside your truck is 90db including road, tire, engine, exhaust, etc. noise all together while driving that's the noise floor. That means your radio has to get over the 90db to be able to really hear the music, which is a fair amount to overcome. Now, let's say you do a full treatment and the noise floor is lowered down to 85db. That is FAR easier for the radio to overcome first of all, second of all at the exact same position of the volume **** before the radio will sound MUCH louder than before without changing a single speaker, the stereo or anything to do with the musical output. I pulled the numbers out of nowhere, but you get the picture. By lowering the noise floor "X"db you raise the effective output by the same amount, basically.
#12
12-30-2010, 07:58 PM
Originally Posted by blazinloud
you need to get rid of the crap china made alpine amp and get something that dc18 will actually enjoy 
#13
12-31-2010, 10:14 AM
Originally Posted by altoncustomtech
There's nothing theoretical about it, though it has to be termed correctly. A full sound deadening treatment raises the "perceived" SPL levels. This is quite simply a product of lowering the noise floor in the vehicle. Say for example, the general noise inside your truck is 90db including road, tire, engine, exhaust, etc. noise all together while driving that's the noise floor. That means your radio has to get over the 90db to be able to really hear the music, which is a fair amount to overcome. Now, let's say you do a full treatment and the noise floor is lowered down to 85db. That is FAR easier for the radio to overcome first of all, second of all at the exact same position of the volume **** before the radio will sound MUCH louder than before without changing a single speaker, the stereo or anything to do with the musical output. I pulled the numbers out of nowhere, but you get the picture. By lowering the noise floor "X"db you raise the effective output by the same amount, basically.
Last edited by blazinloud; 12-31-2010 at 10:17 AM.
#14
12-31-2010, 02:55 PM
Originally Posted by blazinloud
Its theoretical untill you test it in your own vehicle, every vehicle will be different. also flexing panels absorb spl, rather than deflect it. just moving that tool box you keep in the back beside your sub box can change your spl, the entire environment effects it. also when your competing your rarely driving around lol which kind of throws that out the window
Anything in the environment of the subwoofer that has any ability to flex OR reflect sound waves affects the overall output, that's a given. The point of my response was to emphasize that a proper sound deadening treatment in a vehicle CAN lower the noise floor inside of it and therefore the overall output of the stereo will SEEM louder. In fact it's not any louder, it's just easier to hear it. Think of a lunch room at a school. When everyone is yelling and talking loudly it's hard to hear any one person talking at a normal volume unless they're very close to you. Bring everyone in the room down to a whisper and suddenly the person who's talking normally sounds louder. The noise floor was simply lowered.
#15
01-03-2011, 07:37 AM
Originally Posted by fattest1here
if you wanna cut down on the cost you can always use peal n seal and lots of spray foam. all the sound deadoner does is kill some of the metal noise. the foams and fillers is what stops the interior from flexing so much.
#16
01-05-2011, 10:55 AM
Originally Posted by altoncustomtech
Competition is a completely different subject tho, and doesn't pertain to the topic at hand since no question was asked about it.
Anything in the environment of the subwoofer that has any ability to flex OR reflect sound waves affects the overall output, that's a given. The point of my response was to emphasize that a proper sound deadening treatment in a vehicle CAN lower the noise floor inside of it and therefore the overall output of the stereo will SEEM louder. In fact it's not any louder, it's just easier to hear it. Think of a lunch room at a school. When everyone is yelling and talking loudly it's hard to hear any one person talking at a normal volume unless they're very close to you. Bring everyone in the room down to a whisper and suddenly the person who's talking normally sounds louder. The noise floor was simply lowered.
Anything in the environment of the subwoofer that has any ability to flex OR reflect sound waves affects the overall output, that's a given. The point of my response was to emphasize that a proper sound deadening treatment in a vehicle CAN lower the noise floor inside of it and therefore the overall output of the stereo will SEEM louder. In fact it's not any louder, it's just easier to hear it. Think of a lunch room at a school. When everyone is yelling and talking loudly it's hard to hear any one person talking at a normal volume unless they're very close to you. Bring everyone in the room down to a whisper and suddenly the person who's talking normally sounds louder. The noise floor was simply lowered.
im not talking about sounding louder to a human ear, but rather a termlab, where your car is sitting still. and you'll lose spl to flexing panels.
sure it will help kill road noise and it will sound louder to your ear.....but an ear and a termlab are very different.
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