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October 28th, 2016

On the night of the 23rd Oct 2016, around 10pm, an helicopter was hovering close to our house. Then, at some point there were a total of 4 helicopters. 2 of them were definitely police helicopters.

Recorded from my back garden with a Zoom H1. Unfortunately one of the recorder channels does not work anymore, so I had to discard it and convert the file to mono in Audacity.
There is some wind noise. I did a low cut filter in Audacity for ~60Hz, but some wind noise is still present in certain parts.

The helicopters left around 18min into the recording. I retained a few more minutes of audio to give the idea of the normal background noise. I live close to a major airport, so 2 airliner jets fly past towards the end of the recording after min 18. That is quite normal where I live.

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(1)
Type
Wave (.wav)
Duration
24:44:519
Filesize
135.9 MB
Samplerate
48000.0 Hz
Bitdepth
16 bit
Channels
Mono
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