Spread LSB – whodunit?

14450_Spread_HF

This transmission of 21 seconds length consists of:
16 “channels” with carriers measured at [kHz]:
14.455,0
14.462,3
14.470,5
14.474,5 (first tone)
14.482,5
14.485,4
14.492.0
14.498,0
14.504,7
14.511,9
14.520,0
14.524,1 (last tone)
14.532,0
14.535,0
14.541,5
14.547,0
Due to fading etc., these values may be plus/minus 500 Hz.

14450_Spread_SA
Each “block” is of 200 ms length and LSB-modulated. This modulation is
strong and may be compressed. It’s 5 kHz wide, and contains formants which
follow the pattern of human voice.

Click to listen to this 200 ms block: