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{{orphan|date=June 2010}}
{{Short description|Electronic outdoor warning siren}}[[File:1 Tsunamiwarnsystem in Dili.jpg|thumb|ATI in service]]
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.


The ATI Soundblaster HPSS (or 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 omni-directional 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.
==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 system|PA]]) systems and can play programmed tones. Options include solar-powered operation and pre-recorded voice messages.
[[File:HPSS16 at 3rd and Harrison streets in San Francisco.jpg|thumb|ATI HPSS16]]


==Areas known to use HPSS systems==
==Customers==
*[[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.
* [[San Francisco, California]] - Features the sound of the decommissioned [[Federal Signal]] STL-10 sirens that it replaced
*[[Nashville, Tennessee]]
* [[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.
*Casitas Dam, [[Ventura, California]]
* [[Indian Point Energy Center]], [[New York (state)|New York]]
*[[Indian Point Energy Center]], [[New York]]
* [[Israel]] has 300 HPSS systems as a part of its warning system.
*[[Owasso, Oklahoma]] - System of sixteen HPSS32 sirens.
* [[Sedgwick County, Kansas]] and the City of Wichita use 27 ATI HPSS32 units.
* [[Forsyth County, Georgia]] has mostly ATI HPSS16R and ATI HPSS32 systems.
* [[Allen, Texas]] has 26 ATI HPSS32 units.
* [[Fort Riley, Kansas]] has 2 ATI HPSS16 units.
* [[Del City, Oklahoma]] has 8 ATI HPSS16 units.
* [[Malmstrom AFB, MT]] has 6 ATI HPSS16 units.
* [[Pasig]], [[Philippines]] has 3 ATI HPSS32 units.
* [[Davao City|Davao City, Philippines]] has at least 11 ATI HPSS32 units.
* [[Battle Creek, Michigan]] has four rotating ATI HPSS16R units.
* [[Menominee, Michigan]] has three early rotating ATI HPSS16R units
* [[Pensacola NAS]], [[Florida]], ATI HPSS16s mostly used for tornado warnings and play the colors
* [[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>
* [[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}}
* [[Hudson County, New Jersey]] has an unknown number of HPSS sirens.
* [[Antofagasta|Chile, Antofagasta]] has an unknown number of HPSS32 sirens.
* [[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


==Problems and criticism==
==References==
The HPSS sirens have drawn some criticism from civil defense aficionados for several reasons. Most ATI sirens, with the exception of the most recent models (and the ATI systems used in [[San Francisco, California]]), used a 1000 Hz [[Sine wave|Sine]] wave tone, which some allege is not sufficiently distinct against very noisy backgrounds, or over acceptable distances. More recent ATI units use a lower-pitched tone which has given adequate results.
{{reflist}}


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, seeing as few speakers can tolerate such low-pitched sounds at high volume levels anyway, this may not necessarily be the fault of the speakers used.
==External links==
*[https://www.atisystems.com Corporate web page]


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


{{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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