Is the voice of a woman who studies with males and performs Tajweed in front of them considered 'awrah?

It is impermissible for a woman to intermingle with non-mahram men in study, work, or similar settings due to the corruption that results from it. A woman's voice is not awrah (private part), but what is forbidden is to soften the speech, as Allah Almighty says: (Then do not be soft in speech, lest he in whose heart is disease should covet). A woman's recitation of the Qur'an in front of non-mahram men is impermissible if it involves chanting and beautifying the voice, due to the temptation it causes. However, ordinary recitation that does not involve chanting or softening the voice is permissible if there is a need for it.