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how to export the db20 curve coordinates after plot the acoustic pressure as db20 format

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In an acoustic analysis,we usually get the pressure value,not the sound pressure level.

so after the db20 transformation within hypergraph,how to export the db20 format spl value

By now,i use hypergraph to export the curve data.it just output the pressure value

Maybe you have found that there is a difference between the dbA data in nastran results and the correspongding dbA which is transformed with the same pressure data from nastran in hypergraph using the same reference pressure.

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