1. القلقلة

2. مَ مِ مُ فَ فِ فُ عَ عِ عُ سَ سِ سُ
Mechanism of Qalqala
Voweled letters are produced by parting the two components of the articulated parts accompanied by opening of the mouth, circulating of the lips, or lowering of the jaw.
For example:
مَ مِ مُ فَ فِ فُ عَ عِ عُ سَ سِ سُ

3. Mechanism of Qalqala م ف ع س ج ر
Saakin letters are produced by collision of the two components of the articulated parts without any mouth or jaw movement.
For example:
م ف ع س ج ر

4. Mechanism of Qalqala قطب جد = ق ط ب ج د However....
The qalqala letters when they have a sukoon on them have violated the mechanism of articulating saakin letters.
قطب جد = ق ط ب ج د

5. Mechanism of Qalqala Because...
The qalqala letters have the characteristic of shiddah الشِّدَّة (the sound does not run at all when these letters articulated with sukoon).
Causing annoyance in the articulation point due to the imprisonment of the sound behind the articulation point.

6. Mechanism of Qalqala Solution...
To overcome this annoyance, qalqala letters when they have sukoon on them:
are produced by parting the two components of the articulated parts. Contrary to the rest of the saakin letters.
Without any correspondent movement of the mouth and jaw.

7. Difference between saakin letter, qalqala letter and voweled letter
Mechanism of Qalqala
Difference between saakin letter, qalqala letter and voweled letter
Mechanism of articulation
Corresponding mouth/jaw movement
Saakin letter
Collision of articulated parts
None
Qalqala letter
Parting of articulated parts
Vowled letter
Movement

8. Definition of Qalqala Disturbance of the letter
when in the state of sukoon
to the extent of hearing a strong accent
as it is articulated by the parting of the two components of the articulation parts
without accompanying it any opening of the mouth, not circulating of the lips, nor lowering of the jaw.

9. Letters of Qalqala
قطب جد
ق ط ب ج د

10. Note...
The qalala does not resemble a fetha nor a dhammah nor a kesrah.
The qalala does not take the vowel of the proceeding letter nor the following letter.

11. Merged qalaqala letter
For example:
الحَجُّ جْ + جُ = جُّ
Articulated by parting of two components of articulated parts (hence qalqala)
Articulated by collision of two components of articulated parts (hence no qalqala)

12. Mechanism of articulation Corresponding mouth/jaw movement
Different states of Qalqala letters
Mechanism of articulation 
Corresponding mouth/jaw movement
Qalqala?
Example
Merged saakin qalqala letter
Collision of articulated parts
None
First ب in تَبَّ
Non-merged saakin Qalqala letter
Parting of articulated parts
YES
Second بَ in تَبَّ
Vowled qalqala letter
Movement
أَصْحابُ

13. Divisions of qalaqala القَلقَلَةُ الكُبرى القَلقَلَةُ الصُّغرى
The Greater Qalqala
القَلقَلَةُ الصُّغرى
The lesser Qalqala

14. Divisions of qalaqala القَلقَلَةُ الصُّغرى قَدْ أَفْلَحَ يَطْمَعُون
The lesser Qalqala
Qalqala in middle or end of word and not stopping at the word.
Say qalqala then proceed to next letter.
قَدْ أَفْلَحَ يَطْمَعُون

15. Divisions of qalaqala القَلقَلَةُ الكُبرى The Greater Qalqala
Qalqala at the end of a word and stopping at the word.
Say qalqala more clearer than the lesser qalqala.
الطَّارِق

16. Practice of qalaqala Open on surah Al-Buruj Surah number 85 Page 590