The consuming electronic products are limited
in the dimension of speaker, unable to use the larger size leads
to the imperfect result of the low-pitched sound. Therefore we need
a good enclosure to extend the low frequency effect, which means
we still need space, just the limitation of the form is not so strict.
Generally speaking, the larger the capacity is, the better the low
frequency we can gain, because most of the hand-held products still
do not have enough space for enclosure.
When the speaker emits sound the diaphragm will move to compress
the air in the enclosure. Thus the larger powered speaker needs
better outlets to get the proper damping and reach the good low
frequency, but the sound will not be destroyed by the resistant
of the compressed air.
On the other hand, the sound will be exited at both of the front
and the rear area while the speaker works, but the phase is 180
degree and the sound will be neutralized. Therefore it is very important
to make sure that the front and the rear sound fields are completely
separated, and there is no connection between the flowed air to
avoid the neutralization of the sound.
Besides, to emit sound means the vibration will be generated, therefore
the speaker also needs to be firmly fixed on the mechanism, and
adds some shockproof material appropriately, such as the sponge,
which can help to avoid the noise
coming from vibration.
The design of the sound apertures is multi-apertured, and the amount
of them is the more the better, at least exceed 1/8 area of the
surface. The shapes of the sound apertures just need beautiful appearance
to meet industrial design; but are requested to have a larger outward
hole than inward. It means the part which is exposed to the outside
air should be larger than inside