Spectrograms
| Mon, Aug 8 2016 18:35:04 |
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| Mon, Aug 8 2016 18:35:18 |
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| Mon, Aug 8 2016 18:35:48 |
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Project description
| Equipment | Description |
|---|---|
| Recorder | Philips DVT1200 |
| Sampling | 24 kHz, 16 bit, mono, WAV format |
| Receiver | Home-brew single JFET field probe |
| FFT Software | baudline_1.08_linux_x86 |
After a very nice and hot day on the beach of Podersdorf, we made a short trip to a nice tavern called Hölle (eng.: hell).
There is a 16 m high wooden tower on the way to 'hell' - the ideal location for recording the sound of natural radio.
For this recordings, I used my new Phlips DVT1200 (digital voice tracer) to record the samples.
Unfortunately, as you can see in the spectrograms, the LCD display of the DVT1200 makes a lot of noise. Thus, it is necessary to shield it better for the next recordings.
The DVT1200 is recording without any compression in plain WAV format, therefore the spectograms are much clearer compared to my former recording device which used MP3 format.
Overall, it was a very successful recording attempt, with 3 diffuse whistler within 5 minutes of recording!
Update 2022-04-03: I used Spectrum Lab to filter then noise comming from the display of the DVT1200 and generated the sample files.
Due to the lower noiselevel I could discover a few more whistlers in the 5 minutes recording.