bakit malakas ang bass kapag may foam ang earphones?

[silicone]

napapansin ko lang sa mga earphones kahit anong brand na mas maganda ang bass kapa nilagyan ng foam ang earphones.

[deanc]

Napansin ko rin yan sa nokia headphones ko.  Maybe it has something to do with the foam acting as baffles para isolate yung front and rear ng driver.  Kagaya nung apek pag walang baffles ang speaker wala bass.

[silicone]

pakinggan mo yung earphones ng iPod kapag walang foam. tunog lata diba? pero kapag may foam malakas na ang bass.

[mArKhAo]

hmmm... pansin ko din po yan...

[WildSwan]

Gumaganda kasi ang fit sa tenga. eh bakit yung Sennheiser CX-300 ko, wala naman foam malakas ang base. Pero pag tangggaling ko yung rubber na nagse-seal nung earphone sa tenga, nawawala rin ang base. Therefore, hindi foam ang responsable. Yun Sennheiser PX-100, kahit walang foam, malakas ang base kahit na open type sya.

[RiDdLeR???]

Simple explanation lang yan .... napeprevent nung foam yung reflex waves from going back to the back of the earphone and cancelling itself out.

[deanc]

Simple explanation lang yan .... napeprevent nung foam yung reflex waves from going back to the back of the earphone and cancelling itself out.

eggxactly!!! 

[kinyo]

the foam do enhance the lower frequencies ... its acoustic/mechanical property turns out to be resonant at lower frequencies ... in other words, its frequency response as a sound medium would look like a low pass filter that peaks at bass frequencies while the slope for higher frequencies is only slight (because the foam is not so thick)

just my .02 

[neutron]

aaaaaaaaaah basta maganda pag may foam