All monasteries have a bell. Bernard, in writing his rules for monasticism, told his monks that whenever the monastic bell rang, they were to drop whatever they were doing and go immediately to the particular activity (prayer, meals, work, study, sleep) to which the bell was summoning them. He was adamant that they respond immediately, stating that if they were writing a letter they were to stop in mid sentence when the bell rang. The idea in his mind was that when the bell called, it called you to the next task and you were to respond immediately, not because you want to, but because it's time for that task and time isn't your time, it's God's time. For him, the monastic bell was intended as a discipline to stretch the heart by always taking you beyond your own agenda to God's agenda.
Hence, a mother raising children, perhaps in a more privileged way even than a professional contemplative, is forced, almost against her will, to constantly stretch her heart. For years, while raising children, her time is never her own, her own needs have to be kept in second place, and every time she turns around a hand is reaching out and demanding something. She hears the monastic bell many times during the day and she has to drop things in mid-sentence and respond, not because she wants to, but because it's time for that activity and time isn't her time, but God's time.
But aren't monasteries supposed to be silent --at least sometimes?