Ikhfaa

1. If any of these letters ق، ك، ف، ط، ظ، ص، ض، س، ش، ذ، ز، د، ج، ث، ت comes after ن sakin and Tanween excluding 13 letters, 6 throttle, Baa and 6 Idgham Letters, then we will hide the sound of Noon Sakin and tanween while doing Ikhfaa,such rule is called Ikhfa HaQeeQi.
2. The sound of Ikhfa must not be merged with Ghunna, as we do in Idgham and not be appeared, as we do in Izhar.
3. The Ikhfa (Hiding) will be made equal to one Alif and the measure/duration of one Alif is being known by closing or opening a finger.
4. All the stopping rules will be same as mentioned before ,while following the rules of Noon Sakin and Tanween including Meem.