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air7.wav (44.1kHz / Stereo / 15sec / 2.52MB)
Digital video camera (Sony Handy-Cam) and external stereo microphones (Audio technica AT9450 one-point stereo condenser microphone) were used. It was recorded on a Mini DV tape with a 16-bit sound. By SONY VAIO DVgate-motion, iLINK connection was made and it reproduced. With the Realtime Analyzer of the RAE, a measurement screen was repeatedly reproduced, and the check of a measurement display was repeated.
Jumbo jet landing
2002/01/14 15:16 47:24
2002/01/14 15:16 48:09
2002/01/14 15:16 49:07
2002/01/14 15:16 49:22
2002/01/14 15:16 50:01
2002/01/14 15:16 50:02
2002/01/14 15:16 50:16
2002/01/14 15:16 51:01
It is 2.52 seconds from the first to the last photograph.
2002/01/14 15:17 03:09
It is the scenery from the opposite side. The airplane landed at the runway.
The 1/3 octave analysis (peak level display) of Jumbo jet sound.
This is time-frequency display of the power spectrum.
This is the real-time display of the autocorrelation function.
Measurement was performed for 15 seconds with the integration time of 0.2 seconds.
Analysis conditions by SA (Sound Analyzer). It took 8 minutes.
Results. This is time change of the sound level.
All graphs were packed into one picture file by the screen copy
January 2002 by M. Sakurai