Bass: The lowest male voice, with a range from about E2 to E4. Basses are often used for the foundation of a choir or vocal group, and they can also sing lead on songs with a low range.
Baritone: A middle-range male voice, with a range from about A2 to A4. Baritones are often used for supporting roles in a choir or vocal group, and they can also sing lead on songs with a moderate range.
Tenor: The highest male voice, with a range from about C3 to C5. Tenors are often used for the melody line in a choir or vocal group, and they can also sing lead on songs with a high range.
Countertenor: A male voice that sings in the alto range, typically from about F3 to F5. Countertenors are often used in classical music, and they can also be used in other genres such as jazz and folk.
The voice type of a male singer is determined by a number of factors, including the length and thickness of his vocal cords, the size and shape of his vocal tract, and his overall physical health. Some male singers may have a wider range than others, and they may also be able to sing in more than one voice type.