The paper here featured a similar article (syndicated from Paul Vitello, NYTimes). According to him, the frequency of annoyance is 17 kHz.
I used Audacity to create the tone on my laptop, but the speakers couldn't produce it. The home stereo speakers, however, played a burned .wav wonderfully. At least, so I am told.
I couldn't hear it myself (age 20), but my brother (age 19) reported immediate annoyance. Turning the volume up to about 20%, I heard a
tone pretty well, but I expect that the speakers just couldn't handle the high frequency at that amplitude and "dumbed it down."
Could perhaps a similar "dumbing" effect be in place when
- compressing to .mp3
- broadcasting over radio
Perhaps this could rationalize my hearing loss!