I noticed that about 98 % sonometres on the market most likely use the same IC as usually as they are all upper-limited to 8-8,5 kHz. Human ear works up to say 18 kHz. So these things do not measure over half the spectrum? Isn't it more accurate to guess than?
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Less jewellery, more gold into electrotech industry!
Half of the computer problems is caused by bad contacts 
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