The TTS computer is using a "b" rather than a "p". I hear it as a "b". What is causing it to sound like "pop" rather than "Bob" is the vowel sound. When we say "Bob" in English, we pronounce the "o" more like an elongated "aah" sound. In the recording, the vowel has a very short sound, like we use when we say "pop", so it sounds like "pop" to a lot of people. To me, it just sounds like someone with a different accent than mine saying "Bob". In fact, the computer voice pronounces it just like Abishola pronounces it in the new CBS TV show "Bob Hearts Abishola".