Occasionally I find a website or page that is worth posting a link to. This happens to be one of them. A company called Posit Science has developed a program that can test the auditory response time of your brain. You can try the test online!
The test measures in milliseconds your brainâ€™s response to different sounds. Here's the link.
Leave your score in a comment if you'd like! My score was 33 ms.