https://a.tumblr.com/tumblr_o2gk8dOdRE1v0m5e0o1.mp3?plead=please-dont-download-this-or-our-lawyers-wont-let-us-host-audio
http://lavenduers.tumblr.com/post/139377487609/audio_player_iframe/lavenduers/tumblr_o2gk8dOdRE1v0m5e0?audio_file=https%3A%2F%2Fa.tumblr.com%2Ftumblr_o2gk8dOdRE1v0m5e0o1.mp3

siznax:

The Sound of Two Black Holes Colliding—These chirps are gravitational waves converted to audible sounds. The faint thump matches the gravitational waves’ frequencies. The louder chirp is a higher frequency better suited to human ears. via The New York Times