Hold still, this won't hurt a bit. The idea was to compare trombone waveforms through different microphones with Hal, my new 1956 O'scope. I tried to make my tone and volume consistent. Test tone was B flat, one whole step below Middle C, at a nominal 234hz. This is almost one octave below tuning standard A440.
Above: This is the horn mic I made, or hacked, really.
Nice definition, good small wiggly stuff. Now look at this:
Above: This is an Electro-Voice RE20, one of the best broadcast mics ever, also a fine trombone mic. Notice the simplified waveform. This mic is renowned for taking the edge off of voices. Is the simpler waveform a result of fewer high-order harmonics, or just fewer odd ones? Check the next:
This is the legendary Shure SM-57, which for me is a terrible trombone mic. First notice the very strong peaks, which if I remember correctly, means a high proportion of second harmonic. 57s are outstanding snare drum mics, perfect for catc...