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Spectrum Frequency in Horn and Bell

Question asked by rodriguez@colasrail.com on Jan 28, 2019

Dear Srs, recently The Public Announce designer asked to my about what is the spectrum frequency of my horns and bell, I already mentioned that these elements are designed to achieve xx dbA, but I never have listened anything about of spectrum frequency for NAC circuits, if anybody can explain better what is the matter? i really will appreciate the help

 

Thanks

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