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+--- Thread: konsep IDEAL TOURING/MULTIFUNGSIONAL (/showthread.php?tid=3107)
- bass_reflex - 14-02-2011
nunggu yang lain nongol kasih ide
- TUGIYANTO - 14-02-2011
Matur nuhun kang indra...? Tentang phase plug,sarannya gimana kang...?
- icm - 15-02-2011
Phase plug bikin sendiri atau beli jadi mas tugi ?
- TUGIYANTO - 17-02-2011
rencananya mo bikin sendiri bang indra...!
model donut kayae lebih gampang bikinnya...!
tapi bagaimana kelebihan dan kekuranganya...?
Martin audio koq pake model donut...?
- icm - 17-02-2011
nah urusan donat, bisa di konfirmasi ke cak uzip :D saya belum pernah praktek sejauh itu...
- fauzip - 17-02-2011
ampun ilmunya belum sampe bang momodddd.
bagaimana hubungan geometri phase plug vs t/s parameter vs geometri horn wah blas gak mudeng ^:)^ ^:)^ ^:)^
ini cuman secuil info yg saya dapet:
What are the main reasons for using a phase plug?
Some of the main reasons for a phase plug are to:
a) Reduce path length differences between driver diaphragm and horn throat
b) Cancel resonant modes in the front (throat) cavity (only the important first few)
c) Reduce front cavity volume so that [Hf] may be extended (second resonance)
d) Assist in determining (controlling) dispersion pattern
The formulas below will help with assessing some of the above.
[fp] = [c]/(2*[pi]*[h]*[T] - high pass cutoff frequency for phase plug (Hz)
and
[W] = 4*([pi]^2)*([f]^2)*(X^2)*[p0]*[c]*[Sd]*[T] – acoustic power at [St] (Watts)
where,
[c] = 345 m/s – sound velocity
[h] - diaphragm to phase plug clearance
[T] = [Sd]/[St] - compression ratio
[f] - reference frequency ([f] > [fc]) (Hz.)
[X] - diaphragm excursion
[p0] = 1.18 kg/m^3 - air density
And if you are wondering where you take your diaphragm reference point from, if you’ve done it right then [h] will be a constant and so can be taken from any point along the inside edge. If a constant has not been achieved then reading will be the mean diaphragm to inside edge clearance.
The Power equation is acoustic watts
d) can include assisting in dispersion pattern by allowing the use of near parallel and hence tight dispersion expanding horn walls that would normally dictate a large throat section. The phase plug would be used to occupy volume in the throat and reduce its area down to that dictated by the mouth and length for the chosen fo.
- icm - 17-02-2011
fauzip link=topic=3520.msg52195#msg52195 date=1297937631 Wrote:ampun ilmunya belum sampe bang momodddd.
bagaimana hubungan geometri phase plug vs t/s parameter vs geometri horn wah blas gak mudeng ^:)^ ^:)^ ^:)^
kalau ngga mudeng blas segitu, gimana kalau mudeng ^:)^ %-(
- Wicaksono - 17-02-2011
nyimak aja,dari pda koment yang nggak berarti,lebih baik saya terima matengnya aja..., :D :D :D
- bass_reflex - 17-02-2011
![[Image: 579397.gif]](http://r12.imgfast.net/users/1212/49/20/94/smiles/579397.gif)
- TUGIYANTO - 18-02-2011
mbok sisan di bahasa jawa-kan,skalian kang fauziP...! sirahku malah senut-senut....!
harus minum obat nich...!