Pertaining to frequencies corresponding to a normally audible sound wave. These frequencies range approximately from 15 Hz to 20 kHz.
"I was amazed and completely satisfied with your work. I was apprehensive about sending my treasures through the mail to someone I did not know and through a process I had never seen. I carefully selected this music between 1965 and 1970. Even with high qualify playback equipment I could hear the wear taking place in the records. It's hard for ..."