در ضمن کیت بلوتوث nolan با برند n.com عرضه میشه پیشنهاد میکنم حتماً امتحان کنید. من با موتور خودم تو سرعت 100km امتحان کردم هیچ noise یا قطعی صدا نداشت.
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BLUETOOTH INTERCOMS
Text Christian Cavaciuti and Marco Mantovani • Photos Marco DePonti, Marco Martucci
HOW DO I SOUND?
Talk on the phone, listento the radio and talk to other bikes without having to invent a pantomimesketch. With these features, it is obvious that the intercom is literallyexploding, unlike when the systems were limited to communication between riderand passenger. We took some of the most common ones into the tunnel. BMW wins,but there are some surprises
NEWTON WIND TUNNEL 25 09 2011
Once upon a time there was an intercom: the models could becounted on one hand (with two to spare to hold your cigarette) and they werereserved for the wealthy owners of super touring bikes with HAM radio operatorlicenses or with solid connections in the automotive electrical sector, orsimply wealthy individuals who commissioned assembly in the factory.Helmet to helmet transmission took place over a wire, thebatteries lasted from one rest area to the next and the background cracklingnoises were reminiscent of old radio transmissions from London during air raidbombings. That type of intercom is over. Today manufacturers sella new incarnation, completely different.Functionality isobviously the same, but the modern devices are closer relatives to telephonesthan to those primitive wired or radio devices. The technologies they use fortransmission (Bluetooth), the battery capacity (rechargeable nickel metalhydrate or lithium polymer batteries) and the way the signal is handled (noiseelimination algorithms) are basically descendants of advancements in thetelephony sector, not radio. Even the practicality of use is similar to that ofmodern telephones: not too many buttons, just a few adjustments and no technicalconcept. Finally, the costs have followed the descending trend ofconsumer electronics in general, although as always there are offers for anysize wallet. Anyone who has a minimum of experience with intercoms tends toevaluate a few aspects: ease of installation, ease of pairing between devices -a good thing to know is that it is possible to pair, that is talk to oneanother, only devices of the same brand and often even the same model - andobviously audio quality. This last aspect is particularly critical, not onlybecause it depends on the helmet sound proofing quality which can determine verydifferent starting environments between one unit and another (as pointed outduring our test in number 04-2011), but above all because it is fundamentallysubjective: it depends on the voice of the speaker and the ear of the listener.In order to try to reach an objective result, this time we studied a bit ofhuman physiology and we discovered that there are standard speakingcomprehension tests (intelligibility) made up of a series of words to be spokenin sequence, but isolated in order not to allow the listener to reconstructthem from context.After installing andpairing the "proprietary" intercoms of seven modular helmets, andafter evaluating the transmission performance without motion, we then used onceagain the Newton wind tunnel, where we exposed both helmets to a wind flow at50 km/h. A recorder inside the "rider" helmet then repeated thesequence of words in the same way for all of the helmets, sending it to the"passenger" helmet.Here we collected theresults, then reproduced and evaluated in AF-Theater, the listening room wherethe periodical AF Digitale tests audio speakers and systems. The final scorewas therefore made up of an installation score, a pairing score and atransmission score, which in turn was made up 1/3 of an evaluation from astopped position and 2/3 of an evaluation at 50 km/h. The comparison was done amongthe German (BMW, Schuberth), Italian (Nolan, Suomy, Origine) and Belgian (Lazer) methods.
BLUETOOTH INTERCOMS
NOLAN
HELMETN90
SHELL Lexan polycarbonate
CLASPquick release buckle
NATIONALITY Italian
PRODUCTIONItaly
PRICE234 Euros
MANUFACTURERNolan
BATTERY TYPElithium polymer
BATTERY LIFEn/a
EXTRA FEATURESBluetooth 2.0 pairable with telephone, Mp3 and GPS built-in FMradio.
NATIONALITYItalian
PRODUCTIONItaly
PRICE257.49 Euros
INSTALLATION8The entire helmetinterior must be disassembled: it takes time and patience (but nothing comparedto BMW). However, the instructions are clear and the parts join togetherperfectly.
PAIRING9A button is pressed: easyand quick procedure.
AT THE STOP LIGHT8The voice isreconstructed with a natural timbre and in a clear, comprehensible way.
IN MOTION (50 km/h) 8.5 The background noise is high,but intelligibility is still guaranteed. With a more efficient shell it couldaim for perfection.
AUDIO QUALITY 8.3 The result falls among the best of the batch
TOTAL AVERAGE 8.4On the podium with Suomy.The BMW System 6 plays another sport, but the N90 is half the cost and boastsreference audio performance and construction quality.
