Motorola Droid :: Tea Kettle / Airplane Fly Over Noise While On A Phone Call - What To Do?

When I first got my Droid, I would often hear a tea kettle going off in the background with pitch changes, like a plane flying over head. Needless to say, I wasn't going to put up with the distracting noises, especially with a brand new phone. So, Verizon replaced the device. Four months later, I'm still having the same problem. The problem isn't that bad but I should hear such noises, regardless. Verizon says they haven't heard of such an issue but will replace the device again. Has anyone else noticed these noises while on a phone call?