what pitch(es) present in this trench whistle?
A friend bought me a replica trench whistle during the recent First World War Centenary. I'm hoping to use it as the basis for a scale or harmonic structure for a piece of music I'm working on.
When blown, it makes a dissonant tone which sounds to me like a combination of two pitches. Can anyone tell me what pitch(es) are sounding? There's a video of it here.
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This is a spectrogram view from Audacity, zoomed in to the fundamental (there are some overtones too). You can see the pitches changing over time (possibly as the air pressure varies?) - which is how I hear it too.
In the last quarter of the sound, The strongest frequencies look to be around Bb6 (~ 1865 Hz) and B6 (~ 1975 Hz). I'm going by en.wikipedia.org/wiki/Piano_key_frequencies - obviously other reference pitches are possible.
Earlier in the sound, your Bb seems a little sharper, and your B a little flatter.
There may be a quieter component around C as well - I can't tell if that's real or just an artefact.
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