+1Wailer said:The first sirens I heard with a 'phaser' tone were Carson / Southern VP electronic sirens in the early to mid 1980s. They were the old SA400 series with the low-pitched tones."
CA doesn't recognize Priority as a siren tone either (not to derail the discussion since we've discussed it before).tnems7 said:However, some states (California and others) do not recognize High/Low as a siren.- It still has a use.
RolnCode3 said:CA doesn't recognize Priority as a siren tone either (not to derail the discussion since we've discussed it before).
Dr. Dennis Stouffer said:Hi-Lo air horns, as opposed to an electronic hi-lo, are used by LAFD, and LACOFD. They have been used for over 35 years, and have been found to be very effective at clearing intersections. See:
Nope. They're not even allowed to be written on the faceplate for the siren. T13 basically only allows wail and yelp (which are both very clearly defined in T13), everything else is forbidden - even if wail and yelp are also activated.dustymedic said:Aren't they allowed as secondary tones, as long as wail or yelp are operating as well??
well thats pretty dumb. Are CHP officers actually prickish enough to care what kind of siren fire departments are using?Dr. Dennis Stouffer said:RoinCode3 is correct: No siren tone other than wail or yelp is permitted under Calif. code to be used, operable, or part of the electronic siren. The CHP can demand the removal from an EV of any siren that has any other
tones. This is one reason, but not all, that true Hi-Lo air horns are used by LAFD and LACOFD, along with Grovers.
Dr. Dennis Stouffer said:Answer to JohnMarcson: Under Cal.the Hi-Lo horn is an air horn, just like a Grover except that two alternating tones are produced. These are legal
to use only with a siren (wail or yelp only), and they are generally used at intersections or when approaching congested traffic.