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Language is born, when a living being desires to express himself. It is that fire that is lit by the coming together of anubhava or experience and vivakshaa or a desire to express.<ref name=":0">[https://www.academia.edu/38924945/Sanskrit_and_Speech_Language_Pathology Sanskrit and Speech Language Pathology] by Dr. Sampadananda Mishra</ref>Paniniya Shiksha gives a deft description of the process involved in uttering a word from the mouth as follows  

Language is born, when a living being desires to express himself. It is that fire that is lit by the coming together of anubhava or experience and vivakshaa or a desire to express.<ref name=":0">[https://www.academia.edu/38924945/Sanskrit_and_Speech_Language_Pathology Sanskrit and Speech Language Pathology] by Dr. Sampadananda Mishra</ref>Paniniya Shiksha gives a deft description of the process involved in uttering a word from the mouth as follows  

[[File:Shabdotpatti.PNG|thumb|600x600px|Process of Production of Articulate Sounds in a Human]]<blockquote>'''आत्मा''' बुद्ध्या समेत्यार्थान्मनो युङ्क्ते विवक्षया। मनः कायाग्निमाहन्ति स प्रेरयति मारुतम् ।।6।।</blockquote><blockquote>मारुतस्तूरसि चरन्मन्द्रं जनयति स्वरम्। प्रातःसवनयोगं तं छन्दो गायत्रमाश्रितम् ।।7।।</blockquote><blockquote>कण्ठे माध्यन्दिनयुगं मध्यमं त्रैष्टुभानुगम्। तारं तार्तीयसवनं शीर्षण्यं जागतानुगम्।।8।।</blockquote><blockquote>सोदीर्णो मूर्धन्यभिहतो वक्त्रमापद्य मारुतः। वर्णाञ्जनयते तेषां विभागः पञ्चधा स्मृतः।।9।। </blockquote><blockquote>स्वरतः कालतः स्थानात्प्रयत्नानुप्रदानतः। इति वर्णविदः प्राहुर्निपुणं तन्निबोधत ।।10 ।। (Pani. Shik.)<ref name=":1">Paniniya Shiksha ([https://sa.wikisource.org/wiki/%E0%A4%B5%E0%A4%B0%E0%A5%8D%E0%A4%97%E0%A4%83:%E0%A4%B6%E0%A4%BF%E0%A4%95%E0%A5%8D%E0%A4%B7%E0%A4%BE Full text])</ref></blockquote>

[[File:Shabdotpatti.PNG|thumb|600x600px|Process of Production of Articulate Sounds in a Human]]<blockquote>'''आत्मा''' बुद्ध्या समेत्यार्थान्मनो युङ्क्ते विवक्षया। मनः कायाग्निमाहन्ति स प्रेरयति मारुतम् ।।6।।</blockquote><blockquote>मारुतस्तूरसि चरन्मन्द्रं जनयति स्वरम्। प्रातःसवनयोगं तं छन्दो गायत्रमाश्रितम् ।।7।।</blockquote><blockquote>कण्ठे माध्यन्दिनयुगं मध्यमं त्रैष्टुभानुगम्। तारं तार्तीयसवनं शीर्षण्यं जागतानुगम्।।8।।</blockquote><blockquote>सोदीर्णो मूर्धन्यभिहतो वक्त्रमापद्य मारुतः। वर्णाञ्जनयते तेषां विभागः पञ्चधा स्मृतः।।9।। </blockquote><blockquote>स्वरतः कालतः स्थानात्प्रयत्नानुप्रदानतः। इति वर्णविदः प्राहुर्निपुणं तन्निबोधत ।।10 ।। (Pani. Shik.)<ref name=":1">Paniniya Shiksha ([https://sa.wikisource.org/wiki/%E0%A4%B5%E0%A4%B0%E0%A5%8D%E0%A4%97%E0%A4%83:%E0%A4%B6%E0%A4%BF%E0%A4%95%E0%A5%8D%E0%A4%B7%E0%A4%BE Full text])</ref></blockquote>

# The Atman inspires the Buddhi (intellect) and a thought formulates.

# The Atman (the inner mind or Antaranga) joins with arthas, which are there within, in the form of samskaras and the Buddhi (vrtti).

# Combined with Vivaksha (विवक्षा) an intent of the person to express himself.

# Then combined with manas puts forth Vivaksha (विवक्षा) an intent of the person to express himself and pushes the Kayagni or the fire in the body (called Jataragni which causes hunger).

# Manas desires to utter syllables and air is activated in the thoriacic region.

# This Agni drives the maruta or air in turn while slowly moving in the in the chest thoriacic region generates a low sound.

# The air travels upwards and gets modified at different levels in the vocal tract - vocal cords and articulators.

# The air pushed upwards and hits the palate and having reached the mouth (vaktram) gets modified in five ways in the vocal tract - vocal cords and articulators.

# This modified air is called sound, the primary unit of speech.<ref name=":0" />

# This modified air is called varna are divided into five types and varna is the primary unit of speech.<ref name=":0" />

#  

#  

Thus Atman, Mind, Air and Articulators are considered to be the prerequisites for speech production.  

Thus Atman, Buddhi, Maruta and Articulators are considered to be the prerequisites for speech production.  

Varnas or Speech sounds are generated on the basis of the following 1) Pitch (Svara) 2) Quantity (Kala) 3) Place of articulation (Sthana) 4) Effort (Prayatna) 5) Sound material (Anupradana)

Varnas or Speech sounds are generated on the basis of the following 1) Pitch (Svara) 2) Quantity (Kala) 3) Place of articulation (Sthana) 4) Effort (Prayatna) 5) Sound material (Anupradana)