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What is the relationship between nozzle size and sound produced? If there are references on it,kindly put it the comment space.

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    $\begingroup$ Perhaps search musical instruments : wind ie organs, trumpets, horns etc.... However, to save us repeating uselessly your work, what have you found already? $\endgroup$
    – Solar Mike
    Sep 11, 2017 at 10:10
  • $\begingroup$ None of any significance $\endgroup$ Sep 11, 2017 at 17:04
  • $\begingroup$ For example, is there any reduce on dB if we use bigger radius for outlet nozzle? $\endgroup$ Sep 12, 2017 at 0:09

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Imho the nozzle diameter should only affect the impedance, but not the frequency. The frequency is affected by the length of the nozzle. Everything else is really easy to look up using some google skills and keywords like "acoustic resonance".

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