Who voiced Howard 's never seen mother ?
In scenes set at Howard 's home in which he interacts with his never - seen mother ( voiced by Carol Ann Susi ) , he always does so via shouting conversations between the rooms in his house , and she similarly interacts with other characters in this manner , though she did appear momentarily in the overhead photo of Howard and Bernadette 's wedding and from the side in " The Spoiler Alert Segmentation " episode , though her face was not shown .