ARLA/CLUSTER: Off Topic: Ambulâncias que emitem " tremores de terra".

[João Gonçalves Costa]

Devido à constante distracção (utilização ilegal de telemóveis, musica em "altos berros", etc) enquanto conduzem de muitos automobilistas, que alegam não "ouvirem" as sirenes de emergência das ambulâncias e carros da policia, o que tem provocado graves acidentes com estes veículos prioritários; os serviços de socorro de Oklahoma vão passar a utilizar umas novas sirenes, que alem do comum som estridente, vão emitir também tons em baixa frequência sub-audíveis que tem como finalidade fazer vibrar os condutores e os seus carros.

Assim, se for para estes lados em férias, não se admire e nem se confunda, quando ouvir uma sirene também lhe parecer que estás a acontecer um "tremor de terra".

Era capaz de ser uma boa ideia implementar o mesmo pelo menos em Lisboa e no Porto.

João Costa, CT1FBF


[http://tbn3.google.com/images?q=tbn:XXQDQ_g-Vy_wJM:http://www.firetech.com.pk/ReadImage.aspx%3FstrId%3D62%26ImgType%3DProdImg]<http://images.google.pt/imgres?imgurl=http://www.firetech.com.pk/ReadImage.aspx%3FstrId%3D62%26ImgType%3DProdImg&imgrefurl=http://www.firetech.com.pk/Sffeco.aspx%3FId%3D18&usg=__A62GTHZ5Q00aZ9yvTT8TkTTCTmM=&h=300&w=500&sz=23&hl=pt-PT&start=3&sig2=nPAKlGvkxyO_azRu5BJSBA&tbnid=XXQDQ_g-Vy_wJM:&tbnh=78&tbnw=130&ei=YDxBScGjFZuYwwGQuoC8BQ&prev=/images%3Fq%3DAmbulance%2BSiren%2BUses%2BVibrations%26gbv%3D2%26hl%3Dpt-PT%26sa%3DG>[http://tbn3.google.com/images?q=tbn:P6SDAC2nkcoByM:http://physicaplus.org.il/zope/home/100846630031/Bartusiak_en/bartusiak6.jpg/qdisplay_small.jpg]<http://images.google.pt/imgres?imgurl=http://physicaplus.org.il/zope/home/100846630031/Bartusiak_en/bartusiak6.jpg/qdisplay_small.jpg&imgrefurl=http://physicaplus.org.il/zope/home/100846630031/Bartusiak_en&usg=__R8majnSh-f2ARUCGpjMLtif1k6U=&h=274&w=319&sz=23&hl=pt-PT&start=2&sig2=dAUa8uDyHKbl5E4dHVsZvw&tbnid=P6SDAC2nkcoByM:&tbnh=101&tbnw=118&ei=YDxBScGjFZuYwwGQuoC8BQ&prev=/images%3Fq%3DAmbulance%2BSiren%2BUses%2BVibrations%26gbv%3D2%26hl%3Dpt-PT%26sa%3DG>

Ambulance Siren Uses Vibrations

In Oklahoma, the Emergency Medical Services Authority has equipped one ambulance with a new Howler siren that emits low-frequency tones, as well as sirens, that penetrate objects such as cars with vibrations within 200 feet to alert drivers. According to the Associated Press, EMSA plans to install these sirens on all 77 units in Oklahoma within six months, so if radios are too loud and approaching ambulances aren't heard, they will be felt.

The EMSA told AP that its vehicles have been involved in 16 intersection accidents this year, typically caused by an unyielding driver. Ambulances accounted for all but one of those, EMSA spokeswoman Tina Wells told AP.

"The most frequent thing motorists say to us is they didn't see the ambulance coming," Wells said at a news conference on Nov. 11, where the new technology was demonstrated. During the demonstration, two ambulances (one with and one without the Howler siren) were parked near each other with plastic stepladder with three glasses of liquid in between. The liquids in all three glass rippled when the Howler sounded.

"It's going to make going through intersections much safer," Tulsa Police Officer Mike Avey told AP. "People are on their cell phones, people have $1,000 sound systems. You're going to feel it."

The new sirens cost less than $400 each, meaning the entire EMSA fleet in Oklahoma can be outfitted for less than $40,000.

"A moderate accident is going to cost $15,000 in body damage alone," Wells told AP. "We see the potential for recouping this almost immediately."

Fonte: Fire Chief Online Source Guide.
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