Here’s more information:
“About This Book”
In May 1964, the top editors of the Dallas Morning News decided to collect the recollections of all staffers who took part in covering the Kennedy assassination.
Include anecdotes, personal observations and anything else that will reflect the tone of the time as well as indicate the thoroughness of our coverage,” assistant managing editor Bill Rives wrote in a memo to the staff. The original plan was for the writings to be published individually and not as part of one long narrative.
So, this may not be what you are looking for. But it does seem like (to me anyway) that they would tend to write that they heard a number other than three shots (if any of them did). None of them have said in these writings that I can find that they heard anything other than three shots.
Here is fun fact. There were 70 news reporters in Dealey Plaza, James Altgens is the only eyewitness news reporter, positioned 25 feet from the limo and he stated there were two shots. Everyone else is an earwitness. Despite the WC trying to get a three shot response from him, he told them he only heard two. Altgens news flash was read by Don Pardo on ABC after CBS's Walter Cronkite- Merriman Smith's three shot news flash.
Make sure when you are making these declarations that you understand how varied and influenced these people really were. There is no way to quantify these people's statements into categories without setting parameters that define them.