09 accord with anc
#1
01-16-2010 | 08:57 AM
Thread Starter
Joined: Jan 2010
Posts: 6
09 accord with anc
Im close to getting a 09 Accord EXL with automatic noise cancellation (ANC) Ive hear in other forums there are real problems with that since the system sends back sounds into the cabin to cancel out the sub and produces ghost sounds or muddy base!! Has anyone dealth with this problem successfully cuz i REALLY want the white coupe I got lined ujp!!
THANKS
THANKS
#4
01-16-2010 | 01:27 PM
Super Moderator
Joined: Dec 2009
Posts: 3,279
From: Quad Cities, IL
well, just disconnecting the mics might cause other problems if the circuit is still active looking for them. really, you want to disable the actual circuitry.
http://www.topspeed.com/cars/honda/2...d-ar74335.html
Active Noise Control (ANC)
The 2009 Accord has the latest version of Active Noise Control (ANC) first introduced on the previous-generation Accord Hybrid. Now standard on the 2009 Accord V-6 Sedan and Coupe equipped with automatic transmission, and all 190-horsepower four-cylinder models, ANC significantly reduces certain low-frequency sounds in the interior.
Dual microphones - one located in the headliner near the overhead console and the other near the rear overhead light module - pick up low-end drivetrain frequency noise entering the cabin. This audio signal is sent to the Active Noise Control electronic processor, which creates and sends a precisely timed "reverse phase" audio signal to a special amplifier. In turn, the amplifier drives the door speakers to cancel the original noise signal.
ANC dramatically reduces the booming sound of the exhaust for passengers in the front as well as rear seats. In the frequency range below 100 Hertz, ANC results in a remarkable 10 dB reduction in noise level.
is there anyway to defeat that manually? - refer to owner's manual.
and since the ANC system is monitoring "noise" it may not be able to distinguish from the excessive bass created by the sub system from actual noise. however, since the bass produced by subwoofers is in the audio signal, the system should be able to distinguish between the audio signal and extra "noise". from above, it sounds like the amplifiers dedicated to the speakers have audio signal inputs and ANC signal inputs. simply disconnecting the ANC system harness from the speaker amplifiers input should effectively deactivate the system - but i'd want to see a schematic before i can say that with any certainty.
if you're just running the factory premium sound system - with factory sub - i don't see how the ANC would cause muddy bass. instead, the actual factory sub itself is probably a poor performer. if you can activate and deactivate the ANC system, you could easily do an A/B comparison.
honestly, if good quality bass means that much to you - you should consider upgrading the sub system anyway. And defeat the ANC system when you're listening to music - if that ends up being a problem.
this is a good question, one i haven't had to solve yet. i am very interested in the "solution".
don't let this prevent you from buying an awesome car. there is certainly a way around it.
http://www.topspeed.com/cars/honda/2...d-ar74335.html
Active Noise Control (ANC)
The 2009 Accord has the latest version of Active Noise Control (ANC) first introduced on the previous-generation Accord Hybrid. Now standard on the 2009 Accord V-6 Sedan and Coupe equipped with automatic transmission, and all 190-horsepower four-cylinder models, ANC significantly reduces certain low-frequency sounds in the interior.
Dual microphones - one located in the headliner near the overhead console and the other near the rear overhead light module - pick up low-end drivetrain frequency noise entering the cabin. This audio signal is sent to the Active Noise Control electronic processor, which creates and sends a precisely timed "reverse phase" audio signal to a special amplifier. In turn, the amplifier drives the door speakers to cancel the original noise signal.
ANC dramatically reduces the booming sound of the exhaust for passengers in the front as well as rear seats. In the frequency range below 100 Hertz, ANC results in a remarkable 10 dB reduction in noise level.
and since the ANC system is monitoring "noise" it may not be able to distinguish from the excessive bass created by the sub system from actual noise. however, since the bass produced by subwoofers is in the audio signal, the system should be able to distinguish between the audio signal and extra "noise". from above, it sounds like the amplifiers dedicated to the speakers have audio signal inputs and ANC signal inputs. simply disconnecting the ANC system harness from the speaker amplifiers input should effectively deactivate the system - but i'd want to see a schematic before i can say that with any certainty.
if you're just running the factory premium sound system - with factory sub - i don't see how the ANC would cause muddy bass. instead, the actual factory sub itself is probably a poor performer. if you can activate and deactivate the ANC system, you could easily do an A/B comparison.
honestly, if good quality bass means that much to you - you should consider upgrading the sub system anyway. And defeat the ANC system when you're listening to music - if that ends up being a problem.
this is a good question, one i haven't had to solve yet. i am very interested in the "solution".
don't let this prevent you from buying an awesome car. there is certainly a way around it.
Last edited by keep_hope_alive; 01-16-2010 at 02:04 PM. Reason: included more information
#7
01-16-2010 | 02:32 PM
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Joined: Dec 2009
Posts: 3,279
From: Quad Cities, IL
the aforementioned thread suggests killing power to the entire ANC system, unplugging harnesses at the HU, etc. it also brings up a concern about the Bluetooth and Navigation system - if they share the same mics as ANC. That is an important question, as it would change the "solution". Naturally, you don't want to disable other features of the HU.
i think we are at a point where a schematic is required (or even a block diagram) so we can determine how all of the individual components communicate.
i think we are at a point where a schematic is required (or even a block diagram) so we can determine how all of the individual components communicate.
#8
01-16-2010 | 04:25 PM
Thread Starter
Joined: Jan 2010
Posts: 6
the aforementioned thread suggests killing power to the entire ANC system, unplugging harnesses at the HU, etc. it also brings up a concern about the Bluetooth and Navigation system - if they share the same mics as ANC. That is an important question, as it would change the "solution". Naturally, you don't want to disable other features of the HU.
i think we are at a point where a schematic is required (or even a block diagram) so we can determine how all of the individual components communicate.
i think we are at a point where a schematic is required (or even a block diagram) so we can determine how all of the individual components communicate.
#9
01-17-2010 | 09:14 AM
Super Moderator
Joined: Dec 2009
Posts: 3,279
From: Quad Cities, IL
oh, so you're wanting to replace/upgrade the entire sound system? I did not assume that from your earlier posts, just more bass (or concerns with factory bass). what are your end intentions with this car? what do you want to do with a sound system? slightly modified or full custom?
any aftermarket head unit will not have any provisions for the ANC system. so that harness (and others) will not be used. But you should replace everything if you replace the HU - no sense in using factory amps and speakers (since the factory amps may have ANC integration also).
Replacing the factory HU is very difficult if you wish to retain digital climate control (and other factory features using the buttons and screen). Notice how all of the controls are integrated into one piece, with one information screen. some wizardry is required to replace this with aftermarket while retaining necessary controls. I'm not saying it can't be done, but it requires some skill with a soldering iron and fiberglass, and the willingness to cut up and modify your brand new car.
honestly, your best bet (i.e. cheapest/easiest) in these newer cars is to install your aftermarket HU in a pocket below the factory radio/controls, or retain the factory HU and use an OEM interface to grab the signals, sum them, and remove factory equalization. notice how the location of the CD transport (black bezel above pocket) is sized for a standard DIN HU. Putting your aftermarket, high quality CD player here would be an good option.
then just rewire/replace the rest of the sound system with "better" aftermarket speakers and amps.
most "show" cars have average sound systems that just look fancy, where looks >> performance. there are some exceptions, all depends on the installer's personal goals. for true sound quality look for cars in the lanes at IASCA, MECA, USACi, etc.
any aftermarket head unit will not have any provisions for the ANC system. so that harness (and others) will not be used. But you should replace everything if you replace the HU - no sense in using factory amps and speakers (since the factory amps may have ANC integration also).
Replacing the factory HU is very difficult if you wish to retain digital climate control (and other factory features using the buttons and screen). Notice how all of the controls are integrated into one piece, with one information screen. some wizardry is required to replace this with aftermarket while retaining necessary controls. I'm not saying it can't be done, but it requires some skill with a soldering iron and fiberglass, and the willingness to cut up and modify your brand new car.
honestly, your best bet (i.e. cheapest/easiest) in these newer cars is to install your aftermarket HU in a pocket below the factory radio/controls, or retain the factory HU and use an OEM interface to grab the signals, sum them, and remove factory equalization. notice how the location of the CD transport (black bezel above pocket) is sized for a standard DIN HU. Putting your aftermarket, high quality CD player here would be an good option.
then just rewire/replace the rest of the sound system with "better" aftermarket speakers and amps.
most "show" cars have average sound systems that just look fancy, where looks >> performance. there are some exceptions, all depends on the installer's personal goals. for true sound quality look for cars in the lanes at IASCA, MECA, USACi, etc.
#10
01-17-2010 | 11:01 AM
Super Moderator
Joined: Dec 2009
Posts: 3,279
From: Quad Cities, IL
example of a Double DIN install in lower pocket:
http://www.mp3car.com/vbulletin/work...v6-no-nav.html
http://www.mp3car.com/vbulletin/work...v6-no-nav.html