Akali's passive reproduces the sound of Kindred's W each time its triggered.
That means that the sound is reproduced twice, once creating the energy ring and when Akali leaves that ring.
1. Pick Akali sine any skin. Someone on your team has to take Kindred with any skin as well. Enemy team any type of champ
2. Level up Q and hit the enemy champion with a Q. Kindred's W sound should be triggered once.
3. Once you leave the ring, Kindred's W will again be triggered.
Here's the video, with the needed steps
Here's another video without Kindred at our team, to compare the Akali's passive sound:
Special thanks to "gaaytrox" and "Captain Thomas" to help me with the video and the bug reproduction