All these sounds move from the base of the throat outwards

If you observe the Sanskrit vowels, which are A, Aa, E, Eee, Oo, Oou;

         Observe how the sound is generated. The sound A comes at the root of the throat, Aa comes more outward. E comes from the palate, and Ee is more outward. Oo comes to the lips and Ruu, the tongue rolls.

          The rest of the letters are Ae, Ai, O, Au, Am, Aha. If you move to consonants, they start with Ka, Kha, Ga, Gha, Na and they start from the throat. 

        Then Ca, Cha, Ja, Jha, Nna, the sound move towards the mouth.

        Then come Ta, Tha, Da, Dha, Na, these come with the help of the dental movement.

           The last few come from the lips Pa, Pha, Ba, Bha, Ma.

If you observe, all these sounds move from the base of the throat outwards. 

- Gurudev Sri Sri Ravi Shankarji