This is common with voice recognition.
For example, you might be saying "pen" and Bovy hears "pain".
While we have a lot of those corrections built in, we can't anticipate all of them, and that is why we have the Speech Trainer.
Go into Settings, then click the Train button. From there you can add the word Bovy hears (pain) and supply the correct word you mean (pen).
maybe it's from those darn eartags !