Episode #37 - Siman 5 Seif 9 - The Responsibility of the Shaliach Tzibur

If excrement is found, in a house in which a congregation prays even though it is found behind the chazzan and is distant from him, four amohs from the point at which the odor ceases, he nevertheless must remain silent and wait until it is removed or covered, because it is impossible that one of the congregation should not be within four amohs from the place where the odor ceases, and this man is forbidden to listen and to pay attention to what the chazzan is saying.