Prayer: Is the tarakhkhuṣ limit based on hearing the adhān from the city center or entry point?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: Is the tarakhkhuṣ limit based on hearing the adhān from the city center or entry point?

English:

Question #675:

What is the criterion of the tarakhkhuṣ limit, the audibility of the adhān from the houses of the area in which the traveler first arrives or from the centre of the city?

Answer #675:

The criterion is the audibility of the adhān from the city’s end where the traveler leaves the city or enters it.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer