=  NOW 13 WPM  =  TEXT IS FROM APRIL 2023 QST PAGE 55  = 

FREQUENCIES WILL CONCENTRATE MUCH OF THE TRANSMITTED ENERGY IN A PORTION OF
THE AUDIO SPECTRUM THAT CONVEYS LITTLE, IF ANY, INTELLIGIBILITY.  VIRTUALLY
ALL OF MY AUDIO ENGINEERING TEXTBOOKS POINT OUT THAT THE PORTION OF THE
HUMAN VOICE THAT CONVEYS MAXIMUM INTELLIGIBILITY IS BETWEEN 1R5 AND 5 KHZ.
BECAUSE YOU ONLY HAVE 3 KHZ TO BEGIN WITH, IT BECOMES EVEN MORE IMPORTANT
TO CONCENTRATE ON THAT 1R5 TO 3 KHZ.  HANDLING PLOSIVES ANOTHER MICROPHONE
CHARACTERISTIC TO PAY ATTENTION TO IS HOW WELL IT HANDLES SPEECH PLOSIVES,
<  QST DE W1AW  =
OR THE SOUNDS MADE WHEN YOU PRONOUNCE P AND T, AND A FEW OTHER CONSONANTS.
PRONOUNCING WORDS THAT UTILIZE PLOSIVE SOUNDS WILL CAUSE AN EXCESSIVE
COMPRESSION OF THE AIR PROJECTED TOWARD THE MICROPHONE DIAPHRAGM, WHICH
CAUSES IT TO MOVE EXCESSIVELY, CREATING A POPPING SOUND.  THIS IS DEALT
WITH IN MOST MICROPHONES BY THE USE OF POP FILTERING, WHICH IS TYPICALLY A
FOAM COVERING THAT KEEPS THE EXCESS POPPING TO A MINIMUM.  MOST MODERN
=  END OF 13 WPM TEXT  =  QST DE W1AW  <