On 9/03/06 3:59 PM, "Godfrey DiGiorgi", <[EMAIL PROTECTED]> wrote:
> The dictionary definitions (supported by at least 8 dictionaries > according to dictionary.com) I provided earlier are what I've heard > these two adjectives to mean since the 1960s. > > Supersonic: faster than the speed of sound. > Ultrasonic: above the pitch of human hearing. > > I don't know any sensible reason to think that they mean anything > else. "Ultrasonic" has never been used to mean "below the range of > human hearing" ... that is the definition of the term "infrasonic". > > Of course, if y'all just want to be argumentative, go right ahead. Folks, dictionary definitions are correct, but it's just that the vibration frequency applied to the stator of the USM application falls within the ultrasonic range. That's all. Ken -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
