https://jahonen.kapsi.fi/Audio/Papers/AES_PortPaper.pdf
also google for "nozzle port" and "tuyere acoustique"
also google for "nozzle port" and "tuyere acoustique"
Hello
Does anyone know how to calculate laminar ports, as I know they can be made shorter/ narrower than conventional ports because of less distortion.
all the best
August
You would do well to read the linked paper, perhaps some other papers as well. By narrower, I am assuming you mean smaller cross sectional areas? If that's the case, then no, that will be less linear than a larger port cross section, at anything other than small signal levels and low sound pressure levels.
Port compression effects set in at fairly low drive levels, velocities above 10m/second have been shown to cause losses.
Round ports are the most ideal shape if they can be fitted to the enclosure, second to that a square port. Rectangular ports that have a wide cross section but limited height will have more frictional losses than a round port. ( higher reynolds number )
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