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{{multiple issues|
{{Short description|Electronic outdoor warning siren}}[[File:1 Tsunamiwarnsystem in Dili.jpg|thumb|ATI in service]]
{{notability|Products|date=September 2015}}
In [[civil defense siren]]s, the ATI '''High-Power Speaker Station''' (<!--"Soundblaster"-->'''HPSS'''),<ref>{{Cite web |title=High Powered Speaker Station |url=https://www.atisystems.com/wp-content/uploads/2020/07/Spec-HPSS.pdf |website=www.atisystems.com}}</ref> is an electronic outdoor warning [[siren (alarm)|siren]] manufactured by Acoustic Technology, Inc (ATI) that is used to alert citizens of [[airstrike|air raid]]s and [[natural disaster]]s.
{{unreferenced|date=September 2015}}
}}
The ATI Soundblaster HPSS (high-power speaker station) is an electronic outdoor warning system manufactured by Acoustic Technology, Inc (ATI) that is used to alert the surrounding populace of [[tornadoes]], [[hurricanes]], severe [[thunderstorms]], fires and so on. The recent HPSS systems use high-powered electronic speakers, which can be independently arranged to provide directional or omnidirectional coverage, depending on installation. The HPSS16 provides up to 1600 watts of continuous power to drive up to four 400-watt speaker units, whereas the larger 3200-watt HPSS32 can drive up to eight 400-watt speakers. Like other electronic outdoor warning systems (such as [[Federal Signal|Federal Signal's]] [[Federal Signal Modulator|Modulator]], for example), they can also be used as public announcement (PA) systems, and can play a number of programmed tones. Options include solar-powered operation and pre-recorded voice messages. Sometimes these high-powered speakers play the Westminster Chime.


==Areas known to use HPSS systems==
==Systems==
* [[San Francisco, California]] - This system is unique, in that it features the sound of the decommissioned [[Federal Signal]] STL-10 sirens that the HPSS units replaced
HPSS systems use high-powered electronic speakers, which can be independently arranged to provide directional, omnidirectional, and formerly rotational coverage. The HPSS16 has four speakers, while the HPSS32 has eight speakers. The HPSS16R and HPSS32R are former rotational models that were discontinued. They can be used as public address ([[PA system|PA]]) systems and can play programmed tones. Options include solar-powered operation and pre-recorded voice messages. 
* [[Casitas Dam, Ventura, California]] (This system is unique, in that they look like the Federal Signal Directional Speaker Array (DSA) sirens), but can have 7–8 speakers per stack, and gray caps on the speaker cones).
[[File:HPSS16 at 3rd and Harrison streets in San Francisco.jpg|thumb|ATI HPSS16]]
 
==Customers==
* [[San Francisco, California]] - Features the sound of the decommissioned [[Federal Signal]] STL-10 sirens that it replaced
* [[Casitas Dam]], [[Ventura, California]] - Looks like Federal Signal Directional Speaker Array (DSA) sirens, but can have 7–8 speakers per stack, and gray caps on the speaker cones.
* [[Indian Point Energy Center]], [[New York (state)|New York]]
* [[Indian Point Energy Center]], [[New York (state)|New York]]
* [[Owasso, Oklahoma]] - System of sixteen HPSS32 sirens.
* [[Israel]] has 300 HPSS systems as a part of its warning system.
* [[Israel]] has 3100 sirens as a part of its warning system, and 300 of them are HPSS32 sirens.
* [[Sedgwick County, Kansas]] and the City of Wichita use 27 ATI HPSS32 units.
* [[Sedgwick County, Kansas]] and the City of Wichita 27 ATI HPSS32 units are part of the system's 150 sirens.
* [[Forsyth County, Georgia]] has mostly ATI HPSS16R and ATI HPSS32 systems.
* [[Frisco, Texas]] ATI HPSS32 units.
* [[Allen, Texas]] has 26 ATI HPSS32 units.
* [[Fort Riley, Kansas]] 2 ATI HPSS16 units.
* [[Fort Riley, Kansas]] has 2 ATI HPSS16 units.
* [[Del City, Oklahoma]] 8 ATI HPSS16 units.  
* [[Del City, Oklahoma]] has 8 ATI HPSS16 units.
* [[Pasig City]], [[Philippines]] has 1 ATI HPSS32 unit.
* [[Malmstrom AFB, MT]] has 6 ATI HPSS16 units.
* [[Battle Creek, Michigan]] has four rotating 1600 watt ATIs, dubbed the HPSS16R. They run 575hz alert for tornado warnings.
* [[Pasig]], [[Philippines]] has 3 ATI HPSS32 units.
* [[Menominee, Michigan]] has three rotating ATI HPSS32R units
* [[Davao City|Davao City, Philippines]] has at least 11 ATI HPSS32 units.
* [[Pensacola NAS, Florida]] Sirens on the navy base are mostly used for tornado warnings and they play the colors in the morning and evening. When a
* [[Battle Creek, Michigan]] has four rotating ATI HPSS16R units.
                            warning is issued, these siren sound ATI's version of wail signal.
* [[Menominee, Michigan]] has three early rotating ATI HPSS16R units
* [[University of West Florida In Pensacola, Florida]] These siren are used for chemical spills, weather warnings, lock downs, and they play a daily
* [[Pensacola NAS]], [[Florida]], ATI HPSS16s mostly used for tornado warnings and play the colors
                                                      Westminster chime tone at noon.  
* [[University of West Florida]] In [[Pensacola, Florida]], ATI HPSS16 sirens here are used for chemical spills, weather warnings, lock downs, and they play the [[Westminster Quarters|Westminster Chimes]].
 
* [[Arnold, Missouri]] 7 ATI HPSS32 units.<ref>{{Cite AV media |url=https://www.youtube.com/watch?v=5YAnYjdAmq8 |title=Arnold, MO ATI Tornado Siren Test |date=2008-10-26 |last=CrazySirenBoy |access-date=2025-07-22 |via=YouTube}}</ref>
==Problems and criticism==
* [[Ketchikan, Alaska]] maintains a system of 3 ATI HPSS32 units.<ref>{{Cite web|url=https://www.krbd.org/2015/08/26/third-siren-added-to-citys-hazard-warning-system/|title=Third siren added to city's hazard warning system|date=26 August 2015}}</ref><ref>{{Cite web|url=https://sites.google.com/site/greaterketchikanarealepc/all-hazard-siren-information|title = Google Sites|url-status=dead}}</ref>{{Dead link|date=July 2026|fix-attempted=yes}}
Many deployed HPSS systems, with the exception of the most recent models (and the HPSS systems used in [[San Francisco, California]]), used a 1000&nbsp;Hz [[Sine wave|Sine]] wave tone, which some allege is not sufficiently distinct against very noisy backgrounds, or over acceptable distances. More recent HPSS units use a lower-pitched 575&nbsp;Hz tone which has given adequate results.
* [[Hudson County, New Jersey]] has an unknown number of HPSS sirens.  
 
* [[Antofagasta|Chile, Antofagasta]] has an unknown number of HPSS32 sirens.
In San Francisco, many of their HPSS units have the tones of a Federal Signal STL-10 siren, which was one of the sirens used by San Francisco until the whole siren system was replaced with HPSS systems. While this added voice capability to San Francisco's warning network, it has also caused some reliability problems as the comparatively deep-pitched growl of these tones can damage the speakers when playing at high volume. However, this may not necessarily be the fault of the speakers used, as few electronic speakers can tolerate playing such low-pitched, bass-rich sounds at high volume levels for extended periods of time.
* [[Sarnia, Ontario]] and the surrounding communities use a system of 22 ATI HPSS32 units.
* [[Bandon, Oregon]] use 4 ATI HPSS32's.
* [[Palo Verde Nuclear Generating Station]], [[Wintersburg, Arizona]] use over 70 HPSS32 sirens.
* [[Cannon Beach, Oregon]] [[Arch Cape, Oregon]] has 6 HPSS32 sirens


==References==
==References==
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==External links==
==External links==
*[http://www.atisystem.com Corporate web page]
*[https://www.atisystems.com Corporate web page]
 
{{Civil defense sirens}}


{{DEFAULTSORT:Ati Hpss}}
{{DEFAULTSORT:Ati Hpss}}
[[Category:Sirens]]
[[Category:Sirens (alarms)]]
[[Category:Civil defense]]
[[Category:Emergency population warning systems]]

Latest revision as of 21:51, 2 October 2026

Template:Short description

ATI in service

In civil defense sirens, the ATI High-Power Speaker Station (HPSS),[1] is an electronic outdoor warning siren manufactured by Acoustic Technology, Inc (ATI) that is used to alert citizens of air raids and natural disasters.

Systems

HPSS systems use high-powered electronic speakers, which can be independently arranged to provide directional, omnidirectional, and formerly rotational coverage. The HPSS16 has four speakers, while the HPSS32 has eight speakers. The HPSS16R and HPSS32R are former rotational models that were discontinued. They can be used as public address (PA) systems and can play programmed tones. Options include solar-powered operation and pre-recorded voice messages.

ATI HPSS16

Customers

References

  1. ↑ "High Powered Speaker Station". https://www.atisystems.com/wp-content/uploads/2020/07/Spec-HPSS.pdf. 
  2. ↑ Template:Cite AV media
  3. ↑ "Third siren added to city's hazard warning system". 26 August 2015. https://www.krbd.org/2015/08/26/third-siren-added-to-citys-hazard-warning-system/. 
  4. ↑ "Google Sites". https://sites.google.com/site/greaterketchikanarealepc/all-hazard-siren-information. 

Template:Civil defense sirens

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