Îáðàçöû LA áûëè ïðîòåñòèðîâàíû ñïåöèàëèñòàìè FLAB.
FLAB (Ðîññèéñêàÿ Ýëåêòðî-Àêóñòè÷åñêàÿ ëàáîðàòîðèÿ, ã. Ìîñêâà) — âåäóùàÿ êîìïàíèÿ íà ðûíêå òåõíè÷åñêîãî êîíñàëòèíãà â Ðîññèè; ïðåäîñòàâëÿåò ñïåêòð óñëóã, ñâÿçàííûé ñ ðàçðàáîòêîé, çàïóñêîì â ïðîèçâîäñòâî è ïîñëåäóþùåé ïîääåðæêîé àêóñòè÷åñêèõ ñèñòåì â ëþáûõ îáëàñòÿõ èõ ïðèìåíåíèÿ — àâòîìîáèëüíûå ãðîìêîãîâîðèòåëè, Hi-Fi, High-End, Pro-Audio è ò.ï.
LA  3-Õ ÄÞÉÌÎÂÎÉ ØÈÐÎÊÎÏÎËÎÑÍÎÉ ÄÈÍÀÌÈ×ÅÑÊÎÉ ÃÎËÎÂÊÅ
Ñóùåñòâåííîå ïîâûøåíèå Fo (ðåçîíàíñ) äèíàìè÷åñêèõ ãðîìêîãîâîðèòåëåé, ïðè ñóùåñòâåííîì ñíèæåíèè Qms (Ìåõàíè÷åñêîé äîáðîòíîñòè) è íåçíà÷èòåëüíîì ïðèðîñòå BL (ìàãíèòíûé ïîòîê) áûëî îòìå÷åíî äëÿ âñåõ îáðàçöîâ LA.
À×Õ ãðîìêîãîâîðèòåëåé, ïðè ýòîì, ïðàêòè÷åñêè íå èçìåíèëîñü.
Òàáëèöà èçìåíåíèÿ ïàðàìåòðîâ:
| |
|
Fo |
Qms |
Qts |
B1 |
SPLo |
 |
| FLA 001.13 |
Áûëî |
107.3 |
6.86 |
0.731 |
2.832 |
86.006 |
|
| |
Ñòàëî |
133.4 |
1.74 |
0.627 |
2.966 |
85.929 |
|
| |
Èçìåíåíèå |
+24% |
3.95 times < |
1.66 times < |
íåçíà÷èòåëüíî |
íåçíà÷èòåëüíî |
|
| FLA 002.23 |
Áûëî |
110.5 |
6.35 |
0.708 |
2.846 |
86.5 |
|
| |
Ñòàëî |
143.6 |
1.321 |
0.554 |
3.18 |
86.2 |
|
| |
Èçìåíåíèå |
+30% |
4.8 ðàçà < |
1.27 ðàçàs < |
íåçíà÷èòåëüíî |
íåçíà÷èòåëüíî |
|
| FLA 003.40 |
Áûëî |
116.63 |
7.118 |
0.732 |
2.96 |
86.4 |
|
| |
Ñòàëî |
152.6 |
1.95 |
0.668 |
3.1 |
86.4 |
|
| |
Èçìåíåíèå |
+43% |
3.65 ðàçà < |
1.09 ðàçà < |
íåçíà÷èòåëüíî |
íåò |
Ñóáüåêòèâíîå ïðîñëóøèâàíèå ïîêàçàëî, ÷òî ãðîìêîãîâîðèòåëè ëó÷øå çâó÷àò ñ æèäêîñòüþ, êîòîðàÿ èìååò íàèìåíüøóþ âÿçêîñòü è áîëüøèå ïîêàçàòåëè Saturation Magnetization. Óâåëè÷åíèå BL íå ïðèâîäèò ê ïðèðîñòó SPL (õàðàêòåðèñòè÷åñêîé ÷óâòñâèòåëüíîñòè) èç-çà ïðèðîñòà ìàññû ïîäâèæíîé ñèñòåìû (Mms).
ÊÓÌÌÓËßÒÈÂÍÛÅ ÑÏÅÊÒÐÛ ÇÀÒÓÕÀÍÈß
Óëó÷øåíèå êà÷åñòâà çâó÷àíèÿ ÷àñòè÷íî èëëþñòðèðóåòñÿ êóììóëÿòèâíûì ñïåêòðîì çàòóõàíèÿ (çàìåð â íåèäåàëüíîì àêóñòè÷åñêîì îôîðìëåíèè).
LÀ  ÎÄÍÎÄÞÉÌÎÂÎÌ Â× ÃÐÎÌÊÎÃÎÂÎÐÈÒÅËÅ
Ôåððîìàãíèòíàÿ æèäêîñòü FLA 003.40 â îäíîäþéìîâîì Â× ãðîìêîãîâîðèòåëå.
Äëÿ èññëåäîâàíèÿ áûë âçÿò ãðîìêîãîâîðèòåëü ôèðìû TB Speakers 25-669 SD, ñ òêàíûì êóïîëîì, êîòîðûé äîâîëüíî øèðîêî èñïîëüçóåòñÿ â ìóëüòèìåäèÿ ñèñòåìàõ âûñîêîãî êëàññà è Hi-Fi ñèñòåìàõ, òàê æå èçâåñòíûé ñâîèìè õîðîøèìè çâóêîâûìè õàðàêòåðèñòèêàìè.
Áûëè ïðîèçâåäåíû çàìåðû Rz è À×Õ äëÿ âàðèàíòîâ áåç ôåððîìàãíèòíîé æèäêîñòè, ñ ôåððîìàãíèòíîé æèäêîñòüþ çàâîäñêîé çàëèâêè è FLA 003.40.
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Êàê è ïðè èñïîëüçîâàíèè çàâîäñêîé ôåððîìàãíèíîé æèäêîñòè ïðè èñïîëüçîâàíèè FLA 003.40 Fo âîçðàñëà ñ 966 Ãö äî 1086Ãö, ÷òî äëÿ äàííîãî Â× èçëó÷àòåëÿ âïîëíå ïðèåìëåìî (ïðè íåèçìåííîé À×Õ â ðàáî÷åì (2-25êÃö) äèàïàçîíå).
Ïî ãðàôèêó Rz ó Â× ãîëîâêè áåç æèäêîñòè ëåãêî îïðåäèëèòü çíà÷èòåëüíûå èñêàæåíèÿ íà ÷àñòîòàõ 1,8 êÃö; 2,8 êÃö; 4,41 êÃö; 5,8 êÃö; 8 êÃö („ãîðáû“ íà ãðàôèêå Rz).
Ìàãíèòíûå æèäêîñòè ñíèæàþò ýòó ïðîáëåìó èñêàæåíèé, íî â ñëó÷àå ñ FLA 003.40 ìåõàíè÷åñêàÿ äîáðîòíîñòü Qms çíà÷èòåëüíî íèæå: 1,779, âìåñòî 2,361 — äëÿ øòàòíîé (çàâîäñêîé) ôåððîìàãíèòíîé æèäêîñòè. Ýòî ãîâîðèò î òîì, ÷òî äåìïôèðîâàíèå æèäêîñòüþ FLA 003.40 ëó÷øå.
Ïàðàìåòðû Òèëëÿ-Ñìîëëà äëÿ Â× ãðîìêîãîâîðèòåëåé áåç, ñ çàâîäñêîé, è ñ èñïûòóåìîé ìàãíèòíîé æèäêîñòÿìè:
* Loudspeaker Measurement System
* LMS(TM) 4.5.0.352 Jul/01/2005
* (C)opyright 1993-2000 by LinearX Systems, Inc.
* Electro Mechanical Parameters
* Dec 25, 2006 Mon 2:31 pm
* Library=FerroFluidW3-1024S.lib
* Reference Curve=25-669SD w/o any FL Rz
* Delta M/C Curve=+2gr
* Method=Single Curve — Elec System
Domain=FreeAir
Model=TSL
Revc=5.150 Ohm
Fo=966.281 Hz
Krm=31.549u Ohm
Erm=0.928
Kxm=1.108m H
Exm=0.674
Qms=4.003
Qes=3.654
Qts=1.910
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* Loudspeaker Measurement System
* LMS(TM) 4.5.0.352 Jul/01/2005
* (C)opyright 1993-2000 by LinearX Systems, Inc.
* Electro Mechanical Parameters
* Dec 25, 2006 Mon 2:30 pm
* Library=FerroFluidW3-1024S.lib
* Reference Curve=25-669SD w/o FLA/originFL Rz
* Delta M/C Curve=+2gr
* Method= Single Curve — Elec System
Domain= FreeAir
Model= TSL
Revc=5.150 Ohm
Fo=1.086K Hz
Krm=102.724u Ohm
Erm=0.831
Kxm=702.711u H
Exm=0.717
Qms=2.361
Qes=2.600
Qts=1.237
|
* Loudspeaker Measurement System
* LMS(TM) 4.5.0.352 Jul/01/2005
* (C)opyright 1993-2000 by LinearX Systems, Inc.
* Electro Mechanical Parameters
* Dec 25, 2006 Mon 2:32 pm
* Library=FerroFluidW3-1024S.lib
* Reference Curve=25-669SD w/o any FL Rz
* Delta M/C Curve=+2gr
* Method= Single Curve — Elec System
Domain= FreeAir
Model= TSL
Revc=5.150 Ohm
Fo=966.281 Hz
Krm=31.549u Ohm
Erm=0.928
Kxm=1.108m H
Exm=0.674
Qms=4.003
Qes=3.654
Qts=1.910
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ÂÛÂÎÄÛ
Îáùèì ïðåäâàðèòåëüíûì èòîãîì ìîæíî ñ÷èòàòü òî, ÷òî ïðèìåíåíèå ôåððîìàãíèòíîé æèäêîñòè ñ íèçêèì êîýôôèöèåíòîì âÿçêîñòè è âûñîêèì çíà÷åíèåì Saturation Magnetization ÿâëÿåòñÿ ïåðñïåêòèâíûì â øèðîêîïîëîñíûõ äèíàìè÷åñêèõ ãðîìêîãîâîðèòåëÿõ, à òàê æå Â× ãðîìêîãîâîðèòåëÿõ, è íóæäàåòñÿ â äàëüíåéøèõ èññëåäîâàíèÿõ.
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