Is it permissible for a woman to recite aloud in silent prayers, such as Dhuhr, if she is praying alone, with the intention of achieving humility, provided she does not raise her voice excessively?

"Jahr" (audible recitation) in prayer is defined as the worshipper making their recitation audible to those around them, whereas "Israr" (silent recitation) means the worshipper only hears themselves. The minimum for "Israr" is moving the tongue with the recitation, and its maximum is that the worshipper only hears themselves. The minimum for "Jahr" is that the worshipper hears themselves and those next to them.

Audible recitation in prayers where it is prescribed (Jahr prayers) and silent recitation in prayers where it is prescribed (Israr prayers) are Sunnah (definition). Violating this does not invalidate the prayer, but it goes against the Sunnah. Women are like men in terms of audible and silent recitation, except that a woman should not recite audibly in the presence of non-mahram (definition) men.

In silent prayers, it is permissible for the worshipper to raise their voice just enough to hear themselves, in order to combat whisperings (waswasa). It has been reported that the Prophet, peace and blessings be upon him, was sometimes heard reciting some verses during the Dhuhr and Asr prayers. However, raising one's voice in a silent prayer so that others around can hear is contrary to the Sunnah. Adhering to the Sharia (definition) regarding audible and silent recitation is better, and one must strive to achieve devotion (khushu') without violating the Sunnah.