A mu'adhin is a person who calls the prayer in other words the caller of the adhan
The two notable muadhin (callers to prayer) of Prophet Muhammad were Bilal ibn Rabah and Abdullah ibn Umm Maktum. Bilal, an Ethiopian slave who converted to Islam, was the first muadhin in Islamic history, known for his beautiful voice. Abdullah ibn Umm Maktum, a blind companion of the Prophet, was also appointed as a muadhin, demonstrating the inclusivity of the early Muslim community.
The muathin, also spelled muadhin or muazzin.
Abdullahi ibn ummu Makhtum
Muslims are obligated to pray five specific times of the day. The "Call of Prayer" Usually offered by a male, known as "Mu'azan" in Arabic. The prayer call recalls Muslims to offer prayer for the remembrance of their creator "ALLAH TALA" and be thankful to his grants.