Even more so if Roger's the first one to post it!
I haven't bothered to read up on the subject, but they were discussing it on the radio earlier. Apparently, the "Laurel" sound is at a lower frequency and the "Yanni" is at a higher frequency. Older people tend to hear "Laurel", although if you listen to the clip for a long time, some people who originally heard "Laurel" start to hear "Yanni".