Why does our voice sound different when we hear our recorded voice

Human auditory sensory system perceives sound frequencies ranging from 20 Hz through 20,000 Hz. Every human being has a range of audio frequencies (pitch) and their unique intensity patterns.

Thus, we recognize a person, even without directly seeing him/her, by simply hearing his/her voice from the other room.

When a person speaks, his/her voice carries such a unique sound pattern through air to our ears. Hence, what we listen as the voice of a person is what is carried from his/her voice through air.

But there is a difference in how we hear other’s voice and how we hear our own voice. We listen to our voice, when we speak aloud, through two media; one, through the usual aerial medium and the other, through the anatomical skull and tissue system between the mouth and the ear.

Our voice, when we speak aloud, reaches our ears not only through air but also partly and simultaneously through the anatomical (mainly orthopaedic) parts of our jaws and palate.

Thus, when we speak aloud what we listen and then perceive is the combined sound patterns that we receive from these two routes of sound propagation.

When we record our voice, it is only that style and patterns of our voice which travel through air alone are recorded.

It is similar to the one what is heard by others around us from us. When we listen to such recorded voice of ours, it ‘sounds’ different because this time our ears get ‘our sounds’ that travelled through air alone and not along with those that would reach our ears through jaws and palate.