They did a blind test on orchestra applicants, and hid them behind a curtain so the people hiring couldn’t see gender, and then all of a sudden more women were being chosen, when previously that was not the case.

Having seen that and considered it an inspiration, a public service department in Australia tried the same thing and then hit pause on it because it turned out that not being able to consider the gender of applicants led to fewer women being chosen which was the opposite of their goal: https://www.abc.net.au/news/2017-06-30/bilnd-recruitment-trial-to-improve-gender-equality-failing-study/8664888