https://goo.gl/eSXvga
靠著GOOGLE翻譯翻一下
Facebook has repeatedly denied tapping into phones microphones for targeted
advertising, but just because it isn't doesn't mean it can't. According to
Metro, Facebook has applied for a controversial patent for software that will
allow smartphones to begin recording when they hear secret messages hidden in
TV ads.
Facebook已經申請了一項有爭議的專利，
此專利將允許手機在聽到隱藏在電視廣告中的訊息並開始錄音。
As reported by Mashable, Facebook could embed high-pitched audio signals in
broadcast content that