Video Asylum

Posted by Hornlover (A) on June 17, 2004 at 09:08:03

In Reply to: Almost posted by Kal Rubinson on June 15, 2004 at 15:38:27:

Oh no, someone was actually paying attention! You are correct, depending on the loudness level being used. At 40db (re 0.0002ubar), the Fletcher-Munson curves have 1kHz at almost the same sensitivity as the 3-4kHz region (within 1 db). These were the curves I used for reference. However, other studies give different sensitivity curves. The curves derived by Churcher and King show the greatest sensitivity (at 40db) at 2.5kHz, being about 2db greater than at 1kHz. The curves derived by Robinson and Dadson (free field) show the greatest variation, showing the greatest sensitivity at about 4kHz, and being about 8db more sensitive (again, at a 40 db level). Overall, all of the curves show the same general trends, and these were the basis for the equal loudness contours.
Thanks for keeping me honest!