Can I chant loudly after 3 days of period are over?
Yes. In Jain practice, you may resume regular prayer and chanting after the period ends and you have bathed and changed into clean clothes. The important point is to avoid dravya-pūjā (idol touching, abhishek, temple rites) during the actual menstruation. Once the period is over and you are ritually clean again, you can chant, recite Navkar, and perform bhāva-pūjā (internal devotion) or listen to pravachan, including chanting loudly if you wish. The exact timing to resume full temple rites can vary by community, but many follow resuming on the 4th day after bath, with local maryādā guiding the detail. If you do enter the inner sanctum during menstruation, that is generally avoided; outside-the-sanctum worship or mental bhakti is preferred during those days. Always follow your local sangh’s guidance. ( jainknowledge.com)