Question: A recent question about Kol Isha got me thinking: why isn't there a similar "Kol Ish" prohibition against women hearing men sing? 

If you've ever seen a teenage girl listening to pop music you'd know there's an attraction to a male voice.

I tried googling it and found nothing (besides an all-male acapella group called Kol Ish).

Answer: 
[Sefer Chasidim 614](https://www.sefaria.org/Sefer_Hasidim.614?lang=bi)

> 
> מכל מה שכתוב בשיר השירים צריך להזהר שלא ישמע קול אשה והוא הדין לאשה שלא תשמע קול איש. שמכל שהאיש מוזהר האשה מוזהרת.‏  
> 
>  One must be careful from anything in Shir Hashirim, to not hear a woman's voice, and the same law to a woman to not hear a man's voice, for anything that a man is warned against a woman is [also] warned against.
> 
> 
>
On one level the answer may be that the derivative source for *kol isha* does not exist for *kol ish*. The issue of *kol isha* is presented in the Talmud ([Berachot 24a](http://hebrewbooks.org/shas.aspx?mesechta=1&daf=24&format=pdf)) as follows:

> 
> א"ר יצחק טפח באשה ערוה למאי אילימא לאסתכולי בה והא א"ר ששת למה מנה
>  הכתוב תכשיטין שבחוץ עם תכשיטין שבפנים לומר לך כל המסתכל באצבע קטנה של
>  אשה כאילו מסתכל במקום התורף אלא באשתו ולק"ש אמר רב חסדא שוק באשה ערוה
>  שנאמר גלי שוק עברי נהרות וכתיב תגל ערותך וגם תראה חרפתך אמר שמואל קול
>  באשה ערוה שנא' כי קולך ערב ומראך נאוה אמר רב ששת שער באשה ערוה שנא'
>  שערך כעדר העזים
> 
> 
> R. Isaac said: A handbreadth [exposed] in a [married] woman
>  constitutes sexual incitement. In which way? Shall I say, if one gazes
>  at it? But has not R. Shesheth [already] said: Why did Scripture
>  enumerate the ornaments worn outside the clothes with those worn
>  inside? To tell you that if one gazes at the little finger of a woman,
>  it is as if he gazed at her secret place! — No, It means, in one's own
>  wife, and when he recites the Shema’. R. Hisda said: A woman's leg is
>  a sexual incitement, as it says. Uncover the leg, pass through the
>  rivers, and it says afterwards, Thy nakedness shall be uncovered, yea,
>  thy shame shall be seen. **Samuel said: A woman's voice is a sexual
>  incitement, as it says, For sweet is thy voice and thy countenance is
>  comely.** R. Shesheth said: A woman's hair is a sexual incitement, as
>  it says, Thy hair is as a flock of goats. ([Soncino translation](https://halakhah.com/pdf/zeraim/Berachoth.pdf))
> 
> 
> 

As you can see in the part that I bolded, the verse cited by Samuel only refers to the voice of a woman, not the voice of a man.