Low Frequency "Hum" at Low Speed Before Idle

I've seen zero mention of ANC being used in Civic. Also can't say as I've noticed what you describe.

I have noticed the brakes at any pressure on my ex have a hum or hiss. I brought it up to my dealer and they clain they cant hear it. But you can!

Wonder if this is a software issue since your coworker said it was from the active noise cancelling feature. Does the hissing occur after you've been driving a while? Maybe BuhBob's dealer will be able to hear the hissing sound.

Dick w, I haven't been able to find any info on ANC for this model, either so I'm not convinced of that. I'll have to ask a passenger to put an ear to the rear speakers and listen for it. If it's not coming from them, it could be just the frequency of this particular drivetrain.

mmeerrii and 4Tires, I do seem to notice it a bit more after I've been driving for a while. It hasn't been quite as bad lately. Maybe I'm just getting used to it. For me, it isn't when I apply the brakes, but when coasting to a stop. As soon as I stop at idle, it's gone and the engine is pretty quiet. Although the stock tires and brakes do seem needlessly noisy, but that I think is a different problem. lol

I can also see if my phone can record the sound. I'm not sure the microphone is good enough but I'll see what I can do. At least if someone else can validate their's makes the same noise I'll feel a bit better.

Catching the sound in action would help, especially if you can bring it to your dealership as proof that there's an actual problem.

I've been listening for this noise ever since I posted. I'm not really hearing it like I was. Either the computer and I have found balance and it's shifting more appropriately, I've gotten used to it, or something needed a breaking period. I'll try to capture it. For now, I have no idea.

Might be hard to capture the sound how it actually is in person but at least in video it will prove the sound is actually their. Enough for them to take action or get the ball rolling on something

This 'sounds ' like a brake pad rubbing.
Front or rear might be tested by jacking and spinning the wheels. Listen w your stethoscope like device. If it is in front, it is easy to lube the caliper slides, or better,, wait for it to wear in.
Incomplete retraction of rear brake pad may be more involved because a motor screws the caliper pad towards the disc when the parking brake is used. Don`t use it for a while and see if it helps.
Wearing in will help both F&R brakes get quieter.
That is a Friday guess from 1000 miles away.

Yes I've just bought a Honda Civic RS, Yes I'm getting the same Hum, "whining" from the passenger side front wheel? It's not all the time only when slowing down? The car has only 1000Kms on the clock? Is this normal I'm not sure??

If the noise isn't as prominent, maybe it's a sound that appears in some new civics before they're broken in?

You really shouldn't hear any noise from the brakes at all. They don't have to brake in, and if they need to be "cleaned" off, it should literally be gone and 2-3 regular stop and go maneuvers.

go cart said:

This 'sounds ' like a brake pad rubbing.
Front or rear might be tested by jacking and spinning the wheels. Listen w your stethoscope like device. If it is in front, it is easy to lube the caliper slides, or better,, wait for it to wear in.
Incomplete retraction of rear brake pad may be more involved because a motor screws the caliper pad towards the disc when the parking brake is used. Don`t use it for a while and see if it helps.
Wearing in will help both F&R brakes get quieter.
That is a Friday guess from 1000 miles away.

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i think Go Cart might be hitting it on the nail with this one since it has to be coming from somewhere along the drive train or even the brakes. You'll be lucky if its as simple as something brake system related.

BuhBob said:

For me, it isn't when I apply the brakes, but when coasting to a stop. As soon as I stop at idle, it's gone and the engine is pretty quiet. Although the stock tires and brakes do seem needlessly noisy, but that I think is a different problem. lol

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It's not purely due to the brakes since he's coasting to a stop when the hum appears.

Best to bring it to the dealership and if they can't recreate it, have them sit in the passenger seat while you drive so you can point it out.

BuhBob said:

Evening, all! I picked up my EX a couple of weeks ago and have noticed a strange and sometimes uncomfortable low frequency sound when I'm coasting to a stop. The best way I can describe it is a hum (or whir?). It only happens when coasting and stops immediately when the car stops at idle. I was thinking that it was just the engine revving down for a brake assist but I mentioned this in the office and a coworker immediately said it was an active noise cancelling feature and the sound was coming from the speakers. I found a few complaints and discussions of the ANC in the accord forums but no mention of it for the Civics. Has anyone heard this noise? Anyone else think it's ANC?

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Most likely tires/road surface or CVT "braking". Next time you hear it carefully kick the tranny into neutral and see if it goes away.
ANC isn't an option on USA Civics.

tacthecat said:

Most likely tires/road surface or CVT "braking". Next time you hear it carefully kick the tranny into neutral and see if it goes away.
ANC isn't an option on USA Civics.

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This is a great idea! I tried to get a video on my phone while driving home in traffic. It didn't turn out well. You can hear road and engine noise, but it doesn't do the sound justice. I do think it's just the sound of the drive train. It hasn't been as bad for me lately. At first it was almost painful, but now it's not bad. I'll give this idea a try and let you all know what it does.

I just wanted to update everyone on this. I was able to determine that this noise only occurs when the engine is running between about 1200 and 1500 RPM. So I'm going to say that this is just the resonance of the drive train and for some reason, my ears are sensitive to it. I thought this was going to be a big issue for me, but I think I'm used to it now. Thanks for all the discussion on this! It's much appreciated.

BuhBob said:

I just wanted to update everyone on this. I was able to determine that this noise only occurs when the engine is running between about 1200 and 1500 RPM. So I'm going to say that this is just the resonance of the drive train and for some reason, my ears are sensitive to it. I thought this was going to be a big issue for me, but I think I'm used to it now. Thanks for all the discussion on this! It's much appreciated.

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Just wanted to chime in and say I am experiencing this weird issue with my brand new hatch. A humming noise of some sort. What was mentioned as a drive train resonance is a good way to describe mine. I will keep you posted and I will try the "put it in neutral" method while driving and see if the sound goes away.

It's definitely more noticeable with the windows down, which I want to say indicates something from the undercarriage. Maybe a resonance in the exhaust of something. I definitely still hear it but after over a year with the car, it's not nearly as bothersome.

While driving

I have encountered this resonance that appears to come from beneath the vehicle while I am driving. I become noticeable when moving 25mph and up. It increases with speed. When stopped and reving the engine there is no noise. It is not coming from the engine. Any ideas?