Why do you hear a whistle in your ear when talk?

The whistle you hear in you ear when you talk is know as the Lombard Effect, which states that people tend to speak louder and more clearly in noisey enviroments. This is because the brain percieves the ambient noise and adjusts the vocal output accordingly to ensure efficeint communication. When you talk, the sound of you own voice is transmitted to your inner ear, where it is registered as both air-conducted and bone-conducted sound. The brain uses this combined auditory input to gauge the loudness of your voice, and if it deems it to be too low in comparison to the surrouding noise, it trigger a reflex that increase muscle tension in your vocal cords, effectively making your voice louder. This natural feedback mechanism helps you maintain a comfortable speaking level in various acoustic conditions, and the percieve whistle is a result of the brain's adjustment to the louder sound levels generated by your own speech.