Normally, we hear other people’s voices via the intermediary called air then goes into our ear which trembles our eardrum, and our brain will change those vibrations into voices.
However, when we are the ones speaking, our ears receive voices 2 ways. The first one is from outside, just like we hear when others speak, and the other one is from the voice heard inside our skull which is caused by the tremble of vocal cords.
The vibration of vocal cords will go through our skull bones and then go to the eardrum which is called Bone Conduction. The voice from bone conduction is a low frequency voice which makes the sound that we hear when we speak softer and lower-pitched than reality.
Thus, when we hear our recorded voices, we will hear the version of voices that go through air, the low-pitched voice from bone conduction is gone, and that is the reason why the voice we hear is high-pitched.
Professor Dr. Silke Paulmann, head of the Department of Psychology at Essex University, said in an interview with The Guardian magazine that the reason we don’t like our own high-pitched voice is because the voice we hear does not meet our inner expectations. Our voice plays an important role in shaping our unique characters and no one would love their own voices if their voices are not like their expectations.
In addition, there is research which makes the participants listen to their own voice. Only 38% of participants can remember their own voices immediately while the rest have to take a while or some cannot recognise their voices at all. This research shows that we often remember our voice heard in our head through our imagination rather than the real voices that other people hear.
In conclusion, all of us will hear our voices through the combination of two ways which are from the outside (air) and the inside (bone construction). This is the reason why our voices in the recorder or TikTok clips are different from the way we usually hear our voices because the voice we hear is different from the voice we are familiar with.