[EAS] Making a better alerting system

[felucia at att.net]

Hi

The two tones came from AT&T Bell Labs in the early 70s based on their research including no conflicts with other tones used at the time and the signals uniqueness. Industry tested the signal before the FCC adopted the signal in 1976 along with an expansion of the EBS into State and Local warning.

Frank 

On Tuesday, July 25, 2017 4:56 PM, "Botterell, Arthur at CalOES" <Arthur.Botterell at CalOES.ca.gov> wrote:

-----Original Message-----
From: EAS [mailto:eas-bounces at radiolists.net] On Behalf Of Mike McCarthy

>Polite or obnoxious, as long as it gets the attention of the listening populace through industrial noise and chatter, that's all that matters.
>The two tones do a nice job of that....

Again, I wonder whether that's something we know, or just something we believe.  Have there been any studies of how effective the two-tone actually is?  Particularly in noisy environments?  How does it stack up against alternatives?  And how effective is effective enough?

Seems like the budget always runs out before actual tests are performed, which leaves us with a battle of opinions.

Art

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