Calling Dr. Fletcher! Dr. Munson! Apparent 20 dB Discrepancy! - Page 2 - diyAudio
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Old 18th November 2004, 01:59 PM   #11
claudio is offline claudio  Italy
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Join Date: Feb 2002
Location: Italy
As Ron said, The Fletcher-Munson curves were done with headphones, while the Robinson-Dadson curves were done with loudspeakers, thus the differences in the bass region are due to the human body presence.
The original R/D curves received various updates in the years, the last one was in 2003, if I remember well.

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Claudio
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