Our inner ear detects sound vibrations informing our brain about the voice or sound and thus, helping us hear. But did you know that when we speak, we hear our own voice in two different ways.
The first way is through our outer ear. Our voice travels to the outer ear creating vibrations in the eardrum. These vibrations eventually reach the inner ear.
While the second way is through our flesh and skull bones. However, they are better at transmitting deeper, lower frequency sounds as compared to shriller, higher frequency sounds.
As a result, the combination of sounds obtained from the two ways makes our voice appear deeper. Now, when we hear our recorded voice, we only hear the voice which has traveled through our outer ear. Hence, our voice sounds different when recorded.