loudness에,,,의해,,,,저음~중음영역까지는,,,3khz에,,,가까이,,,갈,,,수록,,,크게,,들리게,,됨,,


상기,,,loudness그라프는,,,,같은,,,수준의,,,크기로,,,들리는데,,,필요한,,,음압의,,,크기를,,,표시,,,

hz,,,=,,초당,,,진동수,,,
초당,,,3000천번,,,때려주는,,,것이,,,3khz,,,

타이어,,,,700x25c,,,,
휠,,700c,,,,
ISO규격,,,622,,,,
둘레,,,,,2,111mm=211.1cm=2.111m

시속,,5km,,,,,,초당,,0.66,,회전
시속,,,10,km,,,초당,,,1.3,,,,회전,
시속,,,,20,,,km,,,초당,,,2.6,,,회전,,
시속,,,,,30,,,,km,,,초당,,,3.95,,회전,,,
시속,,,,,,35,,,,,km,,,,초당,,,4.6,,,,회전,,,,,
시속,,,,,,,,40,,,,,,km,,,,초당,,,5.3,,,회전,,,,,,,


회전수에,,,,,t수,,,,곱한,,,,것이,,,발생하는,,,소리의,,,,기음이,,,되겠음,,,

EX)690,,,T,,,인다스트리,,,,나인,,,히드라,,,허브를,,,,시속,,,30,,,km에서,,,코스팅,,,시키면,,,초당,,,,,3174회,,,클릭킹,,,하니,,loudness,,,적으로,,,다른,,,회전수,,,구간에,,비해,,,크게,,들릴,,,가능성이,,,있을테고,,,,

18T,,,DT,,,스위스,,,허브라면,,,시속,,,5km에서는,,초당,,,,12회
주변,,,소음에,,,묻히는,,,저음역이,,주가,,,되는,,,기음이고,,,
시속,,,30,,,이,,,되면,,겨우,,,70가량,,,,

허지만,,,36T라면,,,시속,,,30에서,,,142회,,54T,,,라면,,,213회,,,,훨씬,,,크게,,,들릴,,,가능성이,,크지,,,

물론,,,클릭,,,한번에,,,여러,,대역의,,,소리가,,,함께,,,나기,,때문에,,,(일종의,,,Harmonics),,,단순히,,,그리되지는,,,않고,,,,

고속에서는,,,갭을,,,끝까지,,,안치고,,,관성에,,,의해,,,반쯤,,,떠가는,,,경우도,,,생겨서,,,따질,,,게,,,많지만,,,,


기본,,,베이스는,,,

t수,,,=,,,한바퀴,,,,돌아갈때,,,걸리는,,,회수,,,,
기존,,,라쳇,,,방식은,,,갭,,,개수,,,갭,,,높이와,,,크기,,,
발톱,,,부분,,,돌기의,,,개수,,,등,,,따질,,,것이,,,많고,,,


같은속도,,,=,,,같은,,,,회전수,,,,

소리크기,,,,=같은,,,시간내,,,에너지,,,크기,,×,,,라우드니스,,,

단위,,,시간당,,,,에너지,,,크기,,,=
클릭,,한번의,,소리,,크기,,,X,,클릭킹,,,회수=(회전수,,,X,,T수)

즉,,,한칸,,,한칸의,,,소리가,,,크고,,,,
한바퀴,,,굴릴,,,때,,,여러번,,,,클릭킹,,,하고,,,
속도는,,,,,빠른,,,것이,,,또한,,3khz에,,,가까운,,,상대적,,,고음인,,경우,,,큰,,,소리가,,,나겠지,,,,

한칸,,소리가,,,크려면,,,갭이큰,,,저,,T가,,,,유리하지만,,,,,,
속도에,,,따라,,,배수로,,,증가하기,,때문에,,,,통상,,,높은,,,T,,,수가,,,더,,,크게,,,들리는,,,것,,,

여러,,,,변수가,,,있어,,,꼭,,,그런것은,,,아니지만,,,그런,,,경향이,,있다는,,,것이지,,






dt,,,의,,,경우,,,다른,,,변수가,,,거의,,,배제된,,,상태서,,,
오로지,,,,갭,,,개수와,,,불가피한,,갭,,,크기변화를,,,빼면,,
허브쉘이나,,,휠구성도,,,동일,,,그나마,,,가장,,,공정한,,비교,,가능,,,




삼,,행,,,요약,,,,
1,,,,보통,,,,T,,,수높은게,,소리,,,크다,,EX),,DT,swiss,,star,,ratchet
2,,,,꼭,,,,그런건,,,,아니다,,사실,,,따질게,,,많다,,,
3,,,소리는,,,직접,,,들어보는게,,정확,,그냥,,정비나,,,열심히,,,,하자,,



물론,,,굴러,,,갈,,,때엔,,,,고정되서,,,소리,,,그런거,,,없음,,,,