A PDF file. An online article of a reprint from Ktav Publishers in 1980 of the Rabbi Joseph H. Lookstein Memeorial Volume. The Berman article is in English, discussing the issue of “kol isha”, a woman’s voice, and the source of the proscription against Jewish women singing in front of men and in other situations.
http://www.edah.org/docs/Kol%20Isha.pdf