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> Teen buzz, soneria pe care nu o aud adultii.

einstein1984
post 23 Jun 2006, 10:08
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A high-pitched alarm which cannot be heard by adults has been hijacked by schoolchildren to create ringtones so they can get away with using phones in class.

Techno-savvy pupils have adapted the Mosquito alarm, used to drive teenage gangs away from shopping centres.

They can receive calls and texts during lessons without teachers having the faintest idea what is going on

The alarm, which has been praised by police, is highly effective because its ultra-high sound can be heard only by youths but not by most people over 20.

Schoolchildren have recorded the sound, which they named Teen Buzz, and spread it from phone to phone via text messages and Bluetooth technology.

Now they can receive calls and texts during lessons without teachers having the faintest idea what is going on.

A secondary school teacher in Cardiff said: 'All the kids were laughing about something, but I didn't know what. They know phones must be turned off during school. They could all hear somebody's phone ringing but I couldn't hear a thing.

'One of the other children told me all about it later. I couldn't be too cross, because it shows resourcefulness.'

The Mosquito technology is said to play on a medical phenomenon called presbycusis, or age-related hearing loss.

It is thought to begin at 20 and first affect the highest frequencies ? 18 to 20kHz.

The device was developed by Merthyr Tydfil-based Compound Security.

Boss Howard Stapleton said: 'I think it is a giggle. A teacher would be able to hear the sound only from 1m away. Teenagers could hear it from much further away.'

Voi o auziti? Spuneti si varsta in mesaj. Eu am 22 de ani si o aud cu volumul aproape la maxim. E drept ca nici boxele mele nu sunt prea meseriase.
Puteti downloada si de AICI

This post has been edited by einstein1984: 23 Jun 2006, 10:11


Attached File(s)
Attached File  b041318c44a42deb06301a3114c100cc.mp3 ( 470k ) Number of downloads: 557


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VS-02-MVO
post 23 Jun 2006, 10:11
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am 25 de ani ! inseamna ca daca aud sunetul inca sunt copil blink.gif radmasa.gif


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AlexV
post 23 Jun 2006, 10:14
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vai ce durere de cap m-a lovit cu sunetul asta.


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driverx
post 23 Jun 2006, 10:14
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QUOTE(VS-02-MVO @ 23 Jun 2006, 11:11)
am 25 de ani ! inseamna ca daca aud sunetul inca sunt copil  blink.gif  radmasa.gif
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Ok. perfect. Bine ca stim ce esti de fapt, ca sa te tratam ca atare de acum..... radmasa.gif


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argon
post 23 Jun 2006, 10:14
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E o pacaleala, lumea platea 3 dolari sa-l downloadeze, si nu se dovedea a fi ce credeau ei.

L-am pus in birou, vreu 5 oameni intre 25 si 55 de ani l-au auzit.

This post has been edited by argon: 23 Jun 2006, 10:15


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einstein1984
post 23 Jun 2006, 10:18
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Adica au auzit toti sau doar 5 din 20?

Oricum , aici e moka. Nu poti pune copyright pe un ton de 18 khz.


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Muttley
post 23 Jun 2006, 10:20
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S-aude perfect la orice volum. Din partea mea puteau sa-l faca si mai inalt ca tot il auzeam.
Sunt curios daca pastrama_stelistul il aude, ca ala are apa-n urechi. nedumerire.gif


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argon
post 23 Jun 2006, 10:22
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Il aud toti, dar sa va dau un hint, opriti egalizatorul la Winamp...am facut chestia asta, si nu l-au mai auzit decat 3 din 5 huh.gif Deci ceva e...


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pastrama
post 23 Jun 2006, 10:22
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Muttley, se aude...cu intreruperi da se aude.
Din pacate numai cu urechea dreapta...ca stanga e inundata. icon_mrgreen.gif


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alex
post 23 Jun 2006, 10:27
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atc_teenbuzz.mp3 are frecventa de 15kHz iar b041318c44a42deb06301a3114c100cc.mp3 are frecventa de 18kHz
V-am atasat mai jos un wav sinus pe 20kHz. Nu vad de ce nu ar putea sa-l auda toata lumea. Se stie ca odata cu varsta scade capacitatea de a auzi la "limita" benzii insa sigur nu de la 20 de ani biggrin.gif

Attached File(s)
Attached File  20kHz.wav ( 430.71k ) Number of downloads: 298


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argon
post 23 Jun 2006, 10:29
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Si pe cel de 15 kHz il are cineva? rolleyes.gif


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RainHawk
post 23 Jun 2006, 10:30
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Dus cu pluta.


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Mi-a zgariat pana si neuronul ala de il mai aveam. Deci, la 29 de ani cred ca inca mai aud bine. smile.gif


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argon
post 23 Jun 2006, 10:32
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Aveti grija..musai egalizatorul oprit complet la Winamp, ca sa fie sunetul real, ca daca e ajutat , il aude toata lumea chiar daca au auzul plop biggrin.gif

This post has been edited by argon: 23 Jun 2006, 10:32


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Marty
post 23 Jun 2006, 10:45
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QUOTE(argon @ 23 Jun 2006, 11:29)
Si pe cel de 15 kHz il are cineva? rolleyes.gif
*


Aia de 15 KHz e mai joasa, deci sunt mai multe sanse s-o auzi decit p-aia de 20. wink.gif


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pastrama
post 23 Jun 2006, 10:47
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Pana la urma, e cineva care nu le aude?


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TheSaiLor
post 23 Jun 2006, 10:48
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Hmmmm .... cu un timpan bulit de la 3 ani care in timp si-a pierdut din capacitate si inca unul spart acum vreo 3 ani dar refacut complet aud destul de bine respectivul sunet. Doar ca fara egalizatoare se aude mai incet, dar tot se aude.

P.S. ... ma bucura faptul asta deoarece aveam impresia ca aud ceva mai slab decat restul lumii, dar se pare ca nu e chiar asa.

This post has been edited by TheSaiLor: 23 Jun 2006, 10:50


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kostake
post 23 Jun 2006, 10:58
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Le aud pe amandoua.



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Uncle-Sam
post 23 Jun 2006, 11:04
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am incercat eu acum: persoanele peste 20 de ani nu aud decat daca lipesc urechea de difuzor. cei mai mici de 20 de ani, aud si de la 10m. incercati sa dezactivati egalizatorul placii de sunet si sa puneti niste boxe ieftine fara bass si o sa vedeti ca au dreptate oamenii. ideea e ca sunetul nu trebuie sa sufere absolut nici o modificare


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einstein1984
post 23 Jun 2006, 11:18
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De ce naiba pe ala de 20 khz il aud mai bine decat pe cel de 18khz?
In alta ordine de idei, are cineva un program generator de semnal? Adica unul pe care sa-l gasesc si eu, ori pe dc, ori pe vreun site moka. Ca vrea sa fac niste experimente.......


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florindu
post 23 Jun 2006, 11:28
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...nimic...


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alex
post 23 Jun 2006, 11:41
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QUOTE(einstein1984 @ 23 Jun 2006, 12:18)
De ce naiba pe ala de 20 khz il aud mai bine decat pe cel de 18khz?
  In alta ordine de idei, are cineva un program generator de semnal? Adica unul pe care sa-l gasesc si eu, ori pe dc, ori pe vreun site moka. Ca vrea sa fac niste experimente.......
*



Ala de 20kHz facut de mine are forma sinusoidala. Cel de 18kHz are o forma oarecum nedefinita.

Fisierul de 15kHz si care cred ca e originalul inregistrat dupa alarma este http://www.slashphone.com/download/20060613/atc_teenbuzz.mp3


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miki
post 23 Jun 2006, 12:02
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Bre! Alex! Cam cu ce boxe sau casti vrei sa ascult 20KHz!!!!!
Nu de alta dar ala de 15 si 18 le aud perfect! Doar cu ceva diferente de volum!
Si 20 de ani am avut cam acu 20 de ani!!!!!!


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Uncle-Sam
post 23 Jun 2006, 12:44
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noutati: 1bucata 19 ani, 2 tipi la 20 de ani au auzit toti
alti 4 peste 22 de ani nu au auzit nimic. pana acum regula se confirma. mai caut cobai biggrin.gif


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dRg
post 23 Jun 2006, 13:07
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Parca era vorba ca nu se aude daca e pus ca ring la telefon. Daca voi ascultati la casti,boxe,etc, de pe PC cred si iu ca se aude cat de cat. Difurile alea de pe telefon sunt mai naspa la redare si e posibil sa nu il auziti decat foarte incet.

Ia spuneti acuma care la auzit cand a fost play de pe telefon, la speaker ?

This post has been edited by dRg: 23 Jun 2006, 13:07


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argon
post 23 Jun 2006, 13:09
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Mi-am pus ringtone pe telefon si...mai eficiente sunt vibratiile..adica se aude..dar numa cu telefonul in zona..daca e in buzunar..ciuciu biggrin.gif

Din pacate nu am mp3 ringtone, ci doar polifonic pe 40 de voci(desi o voce e suficienta)..sa-si puna cineva pe telefon ce suporta mp3 ca-s curios cum se aude.

This post has been edited by argon: 23 Jun 2006, 13:15


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cipm
post 23 Jun 2006, 13:17
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Ascultat cu Media Player Classic.
Pe cel de 15 il aud mai bine decat pe cel de 20. Dar si pe ultimul il percep.

Eu am "scorul" de 20+20 smile.gif

Edit later:
corect, poate pe telefon se comporta altfel

This post has been edited by cipm: 23 Jun 2006, 13:19


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sefu_alx
post 23 Jun 2006, 13:26
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ma ce naiba..eu nu aud doar cand incepe un piuit de o juma' de secunda in rest nu aud nimic unsure.gif blink.gif ohmy.gif huh.gif
btw sunt fratele lu' sefu_alex si am 17 ani
o fi din cauza ca la mine nu se downloada ca sa ascult cu winam,ci o ascultai din firefox


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Mutzunache
post 23 Jun 2006, 13:30
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Am testat pe un laptop sunetele, cel pe 15 si cel pe 20. Seful nostru care are 30 de ani, nu a auzit, secretara 45 de ani, nu a auzit, sofer 32 de ani nu a auzit, eu - 24, colegul 21 si alt coleg 27 am auzit.
Se aude de la distanta mare era seful la etaj, zicea ca facem misto, i-am spus sa porneasca winamp, ca noi sa ii spunem cand a a dat play si era uimit ca stiam cand da el play:))).
Dar trebuie scos egalizatorul din winamp altfel aude. Cand intra cineva in birou am facut un playlist de 30 de sunete, iar in momentul in care intra cineva dam play si sa il vedeti pe ala cum face : Ce se aude? si noi : Ce sa se auda?, ahhahhahah. Raman foarte uimiti.. radmasa.gif radmasa.gif

This post has been edited by Mutzunache: 23 Jun 2006, 14:41


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Marty
post 23 Jun 2006, 13:38
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QUOTE(Mutzunache @ 23 Jun 2006, 14:30)
Se aude de la distanta mare era seful la etaj si zicea ca facem misto si i-am spus sa porneasca si noi sa ii spunem cand a a dat play si era uimit ca stiam cand da el play:))).
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Si mai ai multe "si" ca pe mine m-ai capiat si de cap si de ochi cu atitea "si" si nu stiu ce se intimpla si nu stiu daca ma si intelegi da' mai foloseste si tu cite o virgula in loc de"si" si ai sa vezi ca si asa te intelege lumea si poate ca va sta si mai mult de vorba si cu tine!


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Mutzunache
post 23 Jun 2006, 14:38
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Scuze, de obicei scriu foarte corect, dar nu mai pot de ras, radeam, scriam, intra cineva in birou, incepeau "ma ce se aude?". Scuze inca odata. Poti verifica posturile anterioare "dom' profesor".
Acum rad ca au venit niste ingineri si au inceput sa faca fete-fete. radmasa.gif

This post has been edited by Mutzunache: 23 Jun 2006, 14:39


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