Siren usage on Helicopters

[SirenEnthusiast360]

I know they use lightbars on police/medical helicopters, but have they ever used a siren, and if so, what kind?

[Daniel]

I read somewhere that Hawaii Civil Defense has a helicopter-mounted tsunami siren for warning people in remote locations. What kind of a siren, I do not know.

[KnightFox]

I've never seen a lightbar on a helicopter, nor do I think there is ANY reason to have one on there. It's like asking someone " Should we put this $1000+ light on this $1,000,000+ helicopter if no one will see it?"

And I dunno if A siren would help matters any because it of the engines drowning it out along with the distance Between the helicopter and the person that's being alerted

[SirenMadness]

I don't think that the engines of a helicopter would drown out the sound of a good siren, especially if the siren has a distinguishable-in-high-ambient-noise-levels type of signal. Remote public warning on a helicopter is allot better in cases where topography is an issue.

[Robert Gift]

I can't imagine any kind of light bar on a helicopter.

What good would it be?
All aircraft already have FAA required lights.

But a good electronic siren with P.A would be heard even with engine noise.
Federal Signal's EQ siren has the best siren P.A.
I wonder what kind of speaker(s) the FAA would allow on a helicopter?

But better to have a system of warning sirens for those weather conditions when helicopters cannot fly.

[JasonC]

Many Civil Air Patrol planes and Helicopters do have sirens on them. They are mainly used for PA. In fact, there was a Discovery Channel show on Tsunamis that showed a helicopter flying over a beach using the siren tones and PA to warn beach goers.

[Daniel]

I have seen police aircraft in California flying over the interstate with alternating landing lights. The lights on each wing alternate with one in the middle, and they are standard white landing light assemblies. Maybe some police helicopters have this too.

[Robert Gift]

To help prevent mid-air collisions I assume the landing light wigwags are to make them more visible to other aircraft.
Also, I assume they never allow those terribly expensive lamp's filaments to fully cool.
They probably keep current running through the filaments so they stay hot and suffer less expansion and contraction.

I should do that with my homemade wigwag flasher.