Cool...Cool, Cool, Cool.
"Producing Great Sounding Phonograph Records" by Keving Gray (If reading about frequency response and the specific technicalities of cutting a record grab you.)
How Deaf Are You? The audible range of frequencies in humans is 20Hz-20kHz. Most people lose their ability to hear the top few 1kHz intervals by their late teens/early 20s (so they can hear up to somewhere around 17kHz.)
