A handbreadth of a woman [if exposed] is nakedness...This is to tell thee that whoever gazes upon the little finger of a woman is as though he had gazed at her nakedness ! Nay, [the statement of R. Isaac refers] to his wife and for the purpose of reading the Shema'…Shmuel says a woman's voice is to be regarded as nakedness ; as it is said, "For sweet is your voice, and your face is attractive" (Cant. ii. 14).

(3) One should refrain from hearing a woman's singing voice during the reading of the Shema. <rema> and even his wife. But the voice that is regular to him is not Erva (lit. nakedness).

(1)...It is forbidden to listen to the voice of an erva or to look at her hair. If one intentionally does one of these things, we give him lashes of rebellion...

[Rav Nachman said to Rav Yehudah]: Would you like to send regards to Yalta [Rav Nachman's wife]?

He [Rav Yehudah] said: Shmuel said: The voice of a woman is nakedness

And even to hear the voice of an Ervah or to look at her hair is forbidden.

A Tanna stated: This is not the case with [the public reading of] the Torah. Our Rabbis taught: As regards the Torah, one reads and one translates, as long as one does not read and two translate [together]. As regards the Prophets, one reads and two may translate, as long as two do not read and two translate. As regards Hallel and the Megillah, even ten may read [and ten may translate]. What is the reason? Since the people like it, they pay attention and hear.

Three things restore a man's [tranquillity of] mind : melodious sound, sight and smell

Rabbah said: We have it on tradition that evil inclination moves a man only towards what his eyes see.

(12) And God said unto Abraham: ‘Let it not be grievous in thy sight because of the lad, and because of thy bondwoman; in all that Sarah saith unto thee, Listen to her voice; for in Isaac shall seed be called to thee.

R. Joseph said: When men sing and women join in it is sexually immoral; when women sing and men join in it is like fire in tow

(9) On Rashei Chodashim [the first day of the new month, on which special prayers and sacrifices are offered], on Chanukah, and on Purim [women] may wail and clap, but must not sing lamentations. When the corpse is interred, they may neither wailing nor clap. What is "wailing"? When all of them wail as one. "Sing lamentations": when one recites and all of the others respond after her, as it is said, "Teach your daughters wailing and a woman her fellow a lamentation," (Jeremiah 9:19). But in the future to come he [Isaiah] says, "He will swallow death for ever, and Lord God will erase tears from all faces, etc.," (Isaiah 25:8).