Hey, Mouth, please always speak your peace.
It's not rude to be direct!
It's OK to disagree - as long as not with me.
Everyone is entitled to MY opinion.
Only one sound is sufficient.
You are simply notifying that an EV is near.
The siren is merely a gimmick (tool) to draw gaze of unsuspecting people and hopefully they will maneuver to assist the EV.
The fire apparatus I drive has two sirens; Q and electronic something
and an airhorn.
It was a waste to buy two. (This stuff is all expensive and the taxpayers are paying for it.) (And we wasted a lot more money getting the Q in chrome. FedSig should be ashamed what they charge for a little chrome.)
Yes, the Q is loudest, though it does not allow voice "requests" - (never order/instruct anyone, if they have an accident, they may blame you), and the Q also spreads noise all over the place, disturbing everyone.
The electronic uses much less power; 1/10th, but is not as loud as a real
Q. But it does not spread out and bother those in their homes and businesses as much, either.
Both sounding together do not add in volume.
If you hear one, you need not also hear another.
I oppose all those other sounds.
Especially PHASER which is not discerned by the human ear as well as
simple WAIL.
Also, those kinds of sounds may PPPANIC some, making things worse.
And, you are diverting your attention from driving and looking for problems while switching siren modes.
If an accident or incident occurs, and they have a good lawyer, be prepared for a financial enema.
What would really be best:
A super clean, clear digital recording:"Emergenvy Vehicle, can you please move right?"
and "Emergency vehicle, can you please stop and yield"
for all those who do not know what to do.