truck cabin project i'm working on

[knight23]

project namin sa school... Scania R500 cabin (day cab).

[wildthing]

sir anung ginawa ninyo dun sa cabin?... without description kasi, your picture post simply showed a cabin of a truck (nothing special about that)

[knight23]

working on the acoustics of the cabin... investigating the acoustic modes (modal analysis)

[dprox]

working on the acoustics of the cabin... investigating the acoustic modes (modal analysis)

Uy, sayang knight23. Iimbitahin pa naman sana kita mag-EB.
Stay with this forum, and touch base with us when you're back home. OK?

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[knight23]

Uy, sayang knight23. Iimbitahin pa naman sana kita mag-EB.
Stay with this forum, and touch base with us when you're back home. OK?

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school/course project po, kaya walang problema. hehe

[wildthing]

para saan yung study? para ba malaman kung gaano kaingay sa loob ng cabin?!?

[drey]

oo nga... curious ako... :curious:

[safeorigin]

/me is curious

[OyiL]

hula ko:
hindi yan about external noise transmission into the cabin.

measure nila siguro how sound behaves inside the cabin. para sa entertainment system na i-dedesign nila.

[knight23]

I'm doing experimental modal analysis, investigating the eigen-modes (patterns formed due to resonant frequencies) in the cabin and determine if there is a frequency or pattern that might be of interest.

Basically, measure the sound pressure at different points inside the cabin in a grid-like pattern. From the measured sound pressure a frequency response function/transfer function (frequency spectrum) is obtained. The FRF from the different points is processed through a modal analysis software where the eigen-frequencies, eigen-modes and modeshapes are obtained and also an animation can be made of the acoustical pressure inside the cabin. And for further work, make a FE-model and compare it with the experimental model.

[Gumusut_Amige]

I'm doing experimental modal analysis, investigating the eigen-modes (patterns formed due to resonant frequencies) in the cabin and determine if there is a frequency or pattern that might be of interest.

Basically, measure the sound pressure at different points inside the cabin in a grid-like pattern. From the measured sound pressure a frequency response function/transfer function (frequency spectrum) is obtained. The FRF from the different points is processed through a modal analysis software where the eigen-frequencies, eigen-modes and modeshapes are obtained and also an animation can be made of the acoustical pressure inside the cabin. And for further work, make a FE-model and compare it with the experimental model.

lalo lang akong naguluhan sa paliwanag mo bro. medyo ibang level kasi ang project mo at masyadong highly technical.
kung sakaling meron ka ng parameters for comparison, saan naman ang gamit sa ordinaryong pipol like me.

[iho250]

I'm doing experimental modal analysis, investigating the eigen-modes (patterns formed due to resonant frequencies) in the cabin and determine if there is a frequency or pattern that might be of interest.

Basically, measure the sound pressure at different points inside the cabin in a grid-like pattern. From the measured sound pressure a frequency response function/transfer function (frequency spectrum) is obtained. The FRF from the different points is processed through a modal analysis software where the eigen-frequencies, eigen-modes and modeshapes are obtained and also an animation can be made of the acoustical pressure inside the cabin. And for further work, make a FE-model and compare it with the experimental model.

hanu daw?

[dprox]

lalo lang akong naguluhan sa paliwanag mo bro. medyo ibang level kasi ang project mo at masyadong highly technical.
kung sakaling meron ka ng parameters for comparison, saan naman ang gamit sa ordinaryong pipol like me.

Ganito yan pards, sa wikang pangkalye.
(Korek me if I'm wrong, ha knight23?)
Dahil kokonti na ang mga tao sa Sweden, mas tahimik doon (at lalo pa kung nagi-isnow) kaysa dito sa Pinas. Samantala, dito sa atin, manhid na ang tainga natin sa harurot ng makina, kalampag ng piyesa, hirit ng pulitiko at ugong ng kapwa tao.

Kaya kung ika'y nasa manibela sa Sweden, mabubulabog ka talaga kung maingay. Ang sinusuri ni knight23 ay ang paiba-ibang kapal at tindi ng ingay sa loob ng cabin ng Scania truck. Ano pa? E di para makontrol ito at hindi mabulabog yung drayber.

Dapat talagang isali ang ACOUSTICS sa disenyo ng OPV.
Para matahimik naman kahit konti sa ating mga sinasakyan.
Para matahimik din sa Pinas. Nakakatulig na rin, e.
Sana mas marami pang acoustic engineers dito.

[Gumusut_Amige]

Ganito yan pards, sa wikang pangkalye.
(Korek me if I'm wrong, ha knight23?)
Dahil kokonti na ang mga tao sa Sweden, mas tahimik doon (at lalo pa kung nagi-isnow) kaysa dito sa Pinas. Samantala, dito sa atin, manhid na ang tainga natin sa harurot ng makina, kalampag ng piyesa, hirit ng pulitiko at ugong ng kapwa tao.

Kaya kung ika'y nasa manibela sa Sweden, mabubulabog ka talaga kung maingay. Ang sinusuri ni knight23 ay ang paiba-ibang kapal at tindi ng ingay sa loob ng cabin ng Scania truck. Ano pa? E di para makontrol ito at hindi mabulabog yung drayber.

Dapat talagang isali ang ACOUSTICS sa disenyo ng OPV.
Para matahimik naman kahit konti sa ating mga sinasakyan.
Para matahimik din sa Pinas. Nakakatulig na rin, e.
Sana mas marami pang acoustic engineers dito.

thanks bro sa explanation, maganda rin sigurong isama sa package ng mga sasakyan dito sa atin pero i feel na di pa natin kaya ang dagdag na premium para dyan lalo na sa akin na medyo mahina na ang pandinig

[knight23]

Ganito yan pards, sa wikang pangkalye.
(Korek me if I'm wrong, ha knight23?)
Dahil kokonti na ang mga tao sa Sweden, mas tahimik doon (at lalo pa kung nagi-isnow) kaysa dito sa Pinas. Samantala, dito sa atin, manhid na ang tainga natin sa harurot ng makina, kalampag ng piyesa, hirit ng pulitiko at ugong ng kapwa tao.

Kaya kung ika'y nasa manibela sa Sweden, mabubulabog ka talaga kung maingay. Ang sinusuri ni knight23 ay ang paiba-ibang kapal at tindi ng ingay sa loob ng cabin ng Scania truck. Ano pa? E di para makontrol ito at hindi mabulabog yung drayber.

hehe, salamat dprox. that's a pretty good explanation. and also the cabin is considered a workspace, kaya for the comfort, better productivity and less fatigue for the employee/driver.

[iho250]

hehe, salamat dprox. that's a pretty good explanation. and also the cabin is considered a workspace, kaya for the comfort, better productivity and less fatigue for the employee/driver.

i get it now...

[Flagg]

I'm doing experimental modal analysis, investigating the eigen-modes (patterns formed due to resonant frequencies) in the cabin and determine if there is a frequency or pattern that might be of interest.

Basically, measure the sound pressure at different points inside the cabin in a grid-like pattern. From the measured sound pressure a frequency response function/transfer function (frequency spectrum) is obtained. The FRF from the different points is processed through a modal analysis software where the eigen-frequencies, eigen-modes and modeshapes are obtained and also an animation can be made of the acoustical pressure inside the cabin. And for further work, make a FE-model and compare it with the experimental model.

I actually understood this. Aliw me.

[safeorigin]

kindly explain it to me then in your own words flagg

[drey]

kudos to sir DPROX! :bow ako:

[Flagg]

kindly explain it to me then in your own words flagg

The gist of the matter is 'resonant frequencies' and 'sound pressure'.

There are certain sounds na kahit di mo napapansin ay naririnig mo at naiirita ka sa sound na yun.

Parang lamok buzz in a silent place... pansin mo and inis ka.

But lamok buzz in a sports stadium, di mo pansin, pero naririnig mo pa rin, and for some reason, naiirita ka.

But then again, it could be naiirita ka kasi si Lucius masyadong malikot sa seat behind you. Wehehehehe...