Yeah that's what I noticed when I rev my car up. I've been noticing the sound for a few months now but I jus found out the other day that it makes the sound when I rev it up in neutral or in park. I did the samething you're saying I reved it up and there was the sound at 1,5000 to 2,000 rpms. I also noticed that sometimes it makes the sound at different rpm ranges while I'm driving like sometimes in the higher 2,000 range. How I'm accelerating effects it also. It's usually there with slower acceleration. Then goes away by 3,000rpms. Is it like this for you too or anyone else? Sometimes the sound is not there at all like when I'm accelerating faster. Its not there at idle or while im on the freeway. Yeah the sound does sound like its coming from under the valve cover in the head area. Yeah my car still runs great luckily and it is well maintained. That's interesting to hear that other Hondas are doing it too. I plan on tryin to listen to other Accords probably next week. I'll let you guys know how they sound. I have heard some older Accords around here that make a high pitch squealing/humming sound which is kinda weird too. Thanks for the replies.