Originally Posted by
medod
I’ve played the video back through my hi fi. There is nothing but the normal sounds of two turbojets in two aircraft.
Edit: no pop in the ‘young girl’ video. In the video ‘blancolirio’ plays, yep, a clear pop
I too heard nothing notable in the video shot from the south. The video with the audible pop was taken from the north side of the runway (left side of runway, from A/C perspective). At the nine second mark, an audible pop or crack is evident. Attached is a screenshot of the waveform. The pop occurs at 09.24 seconds, after which the recording device's automatic gain control (volume limiter) compensates for the noise (the waveform shrinks instantaneously, and gradually grows again for a half second or so). Something loud definitely occurred at around 09.24 seconds. Below the waveform image is a spectrograph of a three second portion of the audio (8.00 to 11.00 seconds). That image shows two anomalies: one, just before the 1 second mark, and another at about the 1.2-1.3 second mark (8.9 and 9.2-3 seconds according to the video timecode). Upon listening, I could detect no audible anomaly before the 9 second mark. So the spectrograph doesn't tell the whole story I'm afraid.
Waveform of audible anomaly detected in video of Kamloops CT-114 crash.
Spectrograph of audible anomaly detected in video of Kamloops CT-114 crash. Covers a three second portion of the video's audio track (8.00 - 11.00 seconds).