The primary sound Om (AUM) can be made by any human being whether they have the power of speech or not. It is made by the vocal chords and the mouth starting in the wide open position (Aaa), narrowing (Ooo) and closing the lips (Mmmm).
Hindus associate this sound with the deity Ganesh/Ganapathy/Vigneswaran/Pillaiyar.
There are many representations of Ganesh written with the Sanskrit script Om symbol, but there seem to be very few with the Tamil language script Om.
This is a study I have made with Ganesh represented with the Tamil script for Om.