The bid could quite possibly be thrown out again because of the lack of testing data. I don't suppose Hamilton County, OH provides an online hansard (minutes of each meeting) that discusses the bids? That should have a reason why the bid rejection was enacted.SIRENMAN wrote:The bid was thrown out for a reason not beknown to me, but it was rebid and low and behold the testing requirement was not included in the bids this time.
Hazarding a guess and saying that by increasing the intake housing (and thus the volume of which it can contain air) and by speeding up the rotor (and therefore increasing pitch) could quite possibly squeeze that extra 2dB out of the siren. Having said that, it makes flap all difference at a distance.jkvernon wrote:I honestly cannot see how raising the intake housing for the 2001-130 does anything to increase the volume, and by 2 full decibels from the 2001SRNB's MAX recorded output level.
Having said that, I don't think Federal are stupid enough to do this modification and not test it. Speaking hypothetically for a minute: say said changes above could actually (theoretically) increase the output to 140dB @ 30m (100ft), you'd think Federal would actually want to test this to make sure? It would make some good bragging material to the competitors.
Personally, I think that they dropped the testing information so that they could quite possibly get into a second round where testing in an outdoor environment would actually occur, rather than get knocked back by figures on a piece of paper. I have no idea of how their tender process is working though.