John,
I can hear to 18 kHz no problem. Old CRTs, and whatever is going on in the fluorescent lights or hard drives I can here a continuous high pitch sound. Having worked near wind tunnels for 25 years I've undoubtedly broken off some of the tiny hairs in the cochlea. Thus a small portion of my midrange has dimensioned. Unfortunately this accentuates the highs, which means that any persistent frequency between 10 to 13 kHz will cause extreme listening fatigue for me. I can easily hear a 10-12 kHz buzz from and ribbon or electrostatic tweeter and ribbons can produce sound way beyond 20kHz (hardly anyone past their teens can hear or ever heard 20kHz). I'm more amazed that other people don't have similar issues.
When I say that theres a pop or punch in the highs Im just referring to a sudden seemingly uncontrolled burst of energy that doesnt dissipate well at 10-12 kHz. This is different then the constant buzz of a ribbon; rather its punctuated. I can tell you within 30 seconds whether a cone tweeter has this tendency. The buzz of a ribbon tweeter will fatigue you over time because its sustained. Just my opinion
I can hear to 18 kHz no problem. Old CRTs, and whatever is going on in the fluorescent lights or hard drives I can here a continuous high pitch sound. Having worked near wind tunnels for 25 years I've undoubtedly broken off some of the tiny hairs in the cochlea. Thus a small portion of my midrange has dimensioned. Unfortunately this accentuates the highs, which means that any persistent frequency between 10 to 13 kHz will cause extreme listening fatigue for me. I can easily hear a 10-12 kHz buzz from and ribbon or electrostatic tweeter and ribbons can produce sound way beyond 20kHz (hardly anyone past their teens can hear or ever heard 20kHz). I'm more amazed that other people don't have similar issues.
When I say that theres a pop or punch in the highs Im just referring to a sudden seemingly uncontrolled burst of energy that doesnt dissipate well at 10-12 kHz. This is different then the constant buzz of a ribbon; rather its punctuated. I can tell you within 30 seconds whether a cone tweeter has this tendency. The buzz of a ribbon tweeter will fatigue you over time because its sustained. Just my opinion