Weird humming/buzzing sound from air intake on 01 Acura CL?

I live in ABQ which has been getting a ton of ash and smoke from the AZ fire, so I pulled my air filter out and knocked all the ash out, the next day I got a humming sound coming from the intake, and it has a vibration in it. I replaced the filter and it is still there. I have seen many people with this problem after installing an aftermarket intake, but mine is stock. Anyone know what this is? Thank you