Yeah, my wife swears she doesn't hear it. And whenever I mention it (which is everytime I hear a Goldfinch) she asks me, well what did they say before potato chips were invented? Funny gal! The point is, of course they don't say "potato chip", but the four note call is expressed in the same rhythm with accent on the second syllable "ta". If you listen to it that way, soon you'll swear you're hearing "Potato chip".