A follow-up teardown at iFixit has revealed that the iPhone 4's noise cancellation is the same as in the Nexus One. Previously unidentifiable, a mystery chip on both has been given a close look in a ChipWorks scan and is now known to be an Audience A1026 audio signal processor. Both the Apple and Google phones are well-known for their near-ideal ability to filter out background noise and are now know to have accomplished that by using the same hardware.
