I too suspect that the 20-36Hz material comprising your test wasn't reproduced correctly. A low freq loss is highly unlikely. However, if you're a normal middle-aged male you probably have a rapid falloff above 12-14kHz. Pretty normal.
Certainly publishing a standardized curve for a tester/criris isn't a bad idea, principally to rule out gross anmolies. My interest would be more to notice the actual subtle nonlinearities (some caused by the pinna, so no headphone testing allowed!) each of us has. Personal deviations are usually much greater than those of preamps and amps, for example, and perhaps many transducers (cartridges and speakers). Somehoe our earbrains all accomodate to our personal onterpretations of perfect linearity AS WE EXPERIENCE IT, but it would be interesting to try to replicate a trusted writer's hearing with a speaker who's nonlinearity matches it just to know what it's like to hear with someone else's ears, eh?
Perhaps this acoustic research has already been done, but I'm not an AES member....
Certainly publishing a standardized curve for a tester/criris isn't a bad idea, principally to rule out gross anmolies. My interest would be more to notice the actual subtle nonlinearities (some caused by the pinna, so no headphone testing allowed!) each of us has. Personal deviations are usually much greater than those of preamps and amps, for example, and perhaps many transducers (cartridges and speakers). Somehoe our earbrains all accomodate to our personal onterpretations of perfect linearity AS WE EXPERIENCE IT, but it would be interesting to try to replicate a trusted writer's hearing with a speaker who's nonlinearity matches it just to know what it's like to hear with someone else's ears, eh?
Perhaps this acoustic research has already been done, but I'm not an AES member....