News Flash

Fire Department/Emergency Preparedness

Posted on: November 3, 2022

Did You Hear It? LRAD Monthly Siren Testing

LRAD installation

The "Did you hear it ?" (DYHI) campaign was developed to tap the abundant information available about the on-going monthly testing from the people who experience them. By taking advantage of the vast number of Internet users, we can get a more complete description of what people experienced, the effects of the monthly testing, and the extent of missing coverage. And best of all, with your help we can do so almost instantly.

Be a part of our team and share your experience with our NEW "Did you hear it?" form.

By contributing your experience of the notification system, either immediately afterward, or whenever it is possible for you to do so, you make a contribution to the body of information about each activation of the system. You also ensure that your area has been represented in the evacuation drill and siren testing network. This is a two-way street: not only will you add valuable information on the extent of the system coverage, but in the process we hope you will learn more about how other communities gain a greater understanding of this part of the emergency notification system.

DYHI data are now being used in a number of applications. For example:

  • Providing sound sculpting data for coverage and future site locations.
  • Evaluating community understanding of the notification system.
  • Educating the public of why monthly testing is required in the area.
  • Comparing the results of sound projection maps with DYHI responses. 

 

How will I now if testing is in my neighborhood? 

Emergency testing of the notification system is actively underway on the first Saturday of the month at 12 noon within the City of Mill Valley, Tam Valley, Strawberry and Sausalito. 

Long Range Acoustic Device (LRAD) emergency alert systems are unique in that they can project both siren and voice recordings to alert and inform community members during a large-scale disaster. 

Learn more about Southern Marin Fire Protection District's LRAD testing by visiting: https://www.smfd.org/our-district/preparedness/lrad-emergency-sirens

Let us know if you hear it on Saturday, November 5th at 12 PM PST: "Did You Hear It" form

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