Je mesure quoi avec mon micro ?

» 30 Juil 2014 10:03

Oui bizarre ce glitch.

il n'apparait pas sur les fichiers.
(bloc note--->aller vers 4200Hz).
sur les 2 fichiers (un linéaire en download,l'autre log en "code forum"),je les importe dans REW ou holm,pas de glitch qui apparaissent.

» 30 Juil 2014 10:48

thierryvalk a écrit:Voici ta correction importée dans REW (très simple a faire)

Il y a bien un problème avec les valeurs autour de 4288.23Hz

Voilà !!! Je me retrouve avec exactement le même pic dans la courbe de réponse de l enceinte mesurée ! ( alors qu il n est pas présent dans la courbe du micro sous arta ...)

» 30 Juil 2014 11:02

4158.14 0.10563
4222.84 0.325614
4288.23 1.02805
4288.55 0.545599
4341.32 1.51105
4341.5 1.2479
4394.86 2.30107
4395.19 1.81862
4435.65 2.6085
4532.66 2.7849
4632.06 2.61043

variations trop importantes pour petits delta-f => glitch

si tu ne le vois pas sous Arta c'est qu'il lisse la courbe affichée.

avec les valeurs en rouge supprimées :

» 30 Juil 2014 11:35

Ok ... Je vais essayer de remodifier mon .mic et re tester ... Mais au final , il n est pas très bon d être trop précis alors ... Il est peut être préférable de mettre moins de points dans engauge ( tout dépend de la courbe du micro , je vous l accorde :hehe:

)

» 30 Juil 2014 12:23

En plus du nb de points exagéré et des variations trop importantes, l'échelle des freq ne me parait pas correspondre a du 1/n d'octave dans la plage mise en rouge pat Thierry. Il doit y avoir quelquechose de bien foireux dans un des outils utilisé pour pondre ce fichier.

Les micros sont habituellement calibrés au 1/12 ou 1/24 d'octave. Plus précis sert pas a grand chose.

» 30 Juil 2014 13:45

C est possible ... Peux ton paramétrer engauge pour qu il sorte des points correspondant a une échelle 1/n d octave ?

» 30 Juil 2014 13:57

Ce n’est pas un problème de paramétrage, mais bien un bug ou autre comme le dit alkasar.
Calcule les delta F de la liste que j’ai sélectionné, tu verras directement qu’il y a un souci.
Pas normal d’avoir des valeurs différentes à moins de 1 Hz d’écart dans ces fréquences.

» 30 Juil 2014 14:22

Le nb de point par octave n'a aucune importance.

on peut avoir une calib (ou une cible) avec 10 points repartis au pif sur la bande.
les software font une décimation ou interpolation avant déconvolution.

Après Engauge,je passe par HOLM qui permet ensuite d'exporter en impulse ou en fréquence (linéaire avec choix d'incrément) ou log (avec choix du nb de points).

peut-être faire un tracé plus contrasté sur la photo d'acquisition (un coup de crayon noir avec paint).
et faire un zoom sur 10-20 dB pour le lire avec engauge.

Enfin,il suffit juste de supprimer les qq points récalcitrants avec le bloc note comme Thierry l'a fait +haut.
Tu veux la phase Cédric ? je peux le faire en 5minutes si tu postes la courbe d'amplitude.

» 30 Juil 2014 14:38

Oui, REW fait de l'interpolation et se fiche de la résolution de l'échelle (pourvu qu'elle soit cohérente).
ARTA je suis moins sur. Mais bon, il n'y a pas que l'échelle : les valeurs aussi font des sauts anormaux.
Ce souci est visible. Combien y en a t il de mieux cachés ?

CDGG a écrit:Peux ton paramétrer engauge pour qu il sorte des points correspondant a une échelle 1/n d octave ?

je ne connais pas engauge. Avec REW c'est possible d'exporter une courbe de réponse en controlant la résolution. Lisser au 1/12 d'octave et l'export en format txt sera fait au double de la résolution, cad au 1/24.

» 30 Juil 2014 19:27

L'apex de Cédric avec sa phase.

(mettre l'extension qu'on veut .cal .mic .txt truc muche,le contenu reste le même).

CALIB APEX Cédric
(version Frequ.lin--->inc. 10Hz).

version fréquence log.(1000 points)

Code: Tout sélectionner: 20 -3.57865415284 16.6400066511 20.2027362296 -3.55331341373 16.8937272823 20.4075275582 -3.52779063909 17.1500198316 20.6143948178 -3.49991339439 17.4032227987 20.8233590519 -3.46978719997 17.6535866657 21.034441517 -3.439461337 17.9064884241 21.2476636852 -3.40878960411 18.1613746413 21.4630472464 -3.37385847794 18.4026392014 21.6806141102 -3.33871530866 18.6463494148 21.9003864082 -3.3033596731 18.8925300728 22.1223864965 -3.26507403344 19.1276755648 22.346636958 -3.22525227847 19.3586076819 22.573160604 -3.18521136076 19.5918807143 22.8019804776 -3.1434706024 19.8173462964 23.0331198551 -3.09948373006 20.0311092791 23.2666022489 -3.05527598017 20.2470391368 23.5024514097 -3.00988760238 20.4573828592 23.7406913289 -2.96174162611 20.6491941962 23.9813462414 -2.91337704547 20.8429498885 24.2244406273 -2.86414839557 21.0319432672 24.4699992151 -2.81245952446 21.1993506337 24.7180469841 -2.76055712235 21.368454977 24.9686091666 -2.70794086497 21.5309295211 25.2217112506 -2.65371484287 21.671609607 25.4773789828 -2.59928069422 21.8137157404 25.7356383705 -2.54407641069 21.944910718 25.996515685 -2.48778562595 22.0579685727 26.2600374637 -2.43129220289 22.1721724735 26.5262305129 -2.37396980214 22.2684854185 26.7951219109 -2.31602405756 22.3528111948 27.0667390104 -2.25788077931 22.4379917656 27.3411094411 -2.19944018698 22.4960554794 27.6182611132 -2.14078999397 22.5508607927 27.8982222195 -2.08196672878 22.5991735118 28.1810212388 -2.02302049519 22.6249825602 28.4666869384 -1.96388011828 22.6510532301 28.7552483774 -1.90512985445 22.659806588 29.0467349093 -1.84648479921 22.6595483009 29.3411761852 -1.78785219348 22.6556347601 29.6386021568 -1.73020073599 22.6308484203 29.9390430794 -1.67235079123 22.6058108261 30.242529515 -1.61546539772 22.5648762468 30.5490923354 -1.55887290798 22.5168384002 30.8587627253 -1.50271408063 22.4625075028 31.1715721856 -1.44774963367 22.3947755609 31.4875525364 -1.39257891061 22.3263570331 31.8067359205 -1.33912671567 22.2426228844 32.1291548063 -1.28550530739 22.1577286478 32.4548419916 -1.23350956911 22.0625091833 32.7838306065 -1.1820872857 21.9622449489 33.116154117 -1.13139743814 21.8569065843 33.4518463282 -1.08155167081 21.7459325073 33.7909413881 -1.03219656289 21.6317610136 34.1334737907 -0.9843340197 21.5113935704 34.4794783797 -0.936567626715 21.3891614807 34.828990352 -0.89023365274 21.2622935682 35.1820452613 -0.84385632907 21.134005407 35.5386790216 -0.79951206817 21.0026968211 35.8989279111 -0.754984142815 20.8700386187 36.2628285757 -0.711510367644 20.7353956802 36.6304180328 -0.66785412538 20.599398567 37.0017336748 -0.625460589159 20.4624372127 37.3768132735 -0.582908488028 20.3241484491 37.7556949834 -0.541078667599 20.1853873985 38.1384173458 -0.499083143847 20.0453158852 38.5250192926 -0.457213627169 19.9044355598 38.9155401505 -0.415379386023 19.762287718 39.3100196446 -0.374100834307 19.6191885166 39.7084979031 -0.332527157887 19.4741445579 40.1110154605 -0.290618157075 19.3268682688 40.5176132625 -0.248476319663 19.1769554419 40.9283326698 -0.206104777971 19.0246744027 41.3432154623 -0.163159794094 18.8672991254 41.7623038435 -0.121367646172 18.7128133869 42.1856404445 -0.0766141586022 18.5385622035 42.6132683289 -0.0329521204606 18.3654991228 43.0452309965 0.0112641686026 18.1844466983 43.4815723883 0.0557623320061 17.9944908486 43.9223368905 0.10284630837 17.7879197835 44.3675693393 0.145552294802 17.5874640494 44.8173150256 0.190777478299 17.3693439853 45.271619699 0.236153584614 17.1386545204 45.7305295734 0.281148169038 16.8934195443 46.1940913306 0.32111781635 16.6684870185 46.6623521259 0.370737418318 16.3640373724 47.1353595926 0.414286957601 16.0761140442 47.6131618469 0.456429237484 15.7799086434 48.0958074926 0.498461056284 15.4545941167 48.5833456261 0.538660405258 15.1201464398 49.0758258418 0.577229168362 14.7750043232 49.5732982367 0.613840118085 14.4042600963 50.0758134154 0.648253191183 14.0242255247 50.5834224957 0.678043810373 13.6689446837 51.0961771136 0.709286277742 13.2234784506 51.6141294284 0.735425008631 12.8037222584 52.1373321281 0.753928100348 12.4867683604 52.665838435 0.7810584905 11.8779838446 53.1997021107 0.793933019692 11.4886132563 53.7389774618 0.80609967144 11.0375922111 54.2837193455 0.814185449552 10.6528611596 54.833983175 0.818832791604 10.0477765903 55.3898249252 0.816729132334 9.67803748202 55.9513011384 0.811582404583 9.23252050172 56.5184689301 0.805554024212 8.88501337084 57.0913859948 0.788701340779 8.33754124848 57.6701106118 0.765677161603 7.82012135105 58.2547016512 0.75026254687 7.56072322305 58.8452185797 0.725431157933 7.1843311358 59.441721467 0.703348779203 6.89205662471 60.0442709916 0.666047974459 6.48786453555 60.6529284471 0.625716685202 6.12837306479 61.2677557485 0.597215171419 5.9303406362 61.8888154384 0.559969117457 5.69582136489 62.5161706933 0.537891599513 5.56692432837 63.1498853301 0.493729236329 5.35399831731 63.7900238127 0.450140913376 5.18387444196 64.4366512584 0.408272447955 5.05532337247 65.0898334447 0.369986752519 4.97403001601 65.7496368156 0.335045246332 4.92606582237 66.4161284889 0.304206666346 4.90422077396 67.0893762627 0.277719008389 4.90394593558 67.7694486222 0.266261578059 4.9142246055 68.4564147471 0.248816483422 4.93742228971 69.150344518 0.240569462925 4.95348225076 69.8513085242 0.229319466091 4.98639780909 70.5593780704 0.221877704022 5.01901810176 71.2746251841 0.220444419688 5.04266773178 71.997122623 0.222436925364 5.05341119214 72.7269438821 0.226911124078 5.0512692971 73.4641632018 0.233879616539 5.0303628687 74.2088555748 0.24364340715 4.98552682755 74.961096754 0.253881032915 4.92397160665 75.7209632601 0.264023684814 4.84281682825 76.4885323898 0.274648336698 4.73493510929 77.2638822231 0.288726651934 4.54537752148 78.0470916315 0.296071604223 4.39954588899 78.838240286 0.303866982858 4.15992262424 79.6374086652 0.30642115803 3.98879005013 80.4446780637 0.306026850908 3.81229126396 81.2601305998 0.304086283784 3.63420705773 82.0838492246 0.299121056738 3.45606716102 82.9159177298 0.292448178419 3.28156277389 83.7564207566 0.279167881252 3.02900147888 84.6054438041 0.268101412344 2.86961038395 85.4630732382 0.249297950452 2.64366494323 86.3293963001 0.235299506571 2.50562207734 87.2045011157 0.220656839244 2.37389152428 88.0884767038 0.205188676936 2.25508047675 88.9814129857 0.181955445421 2.08715555984 89.8834007944 0.166525263064 1.98395807313 90.7945318835 0.143068340343 1.83858054173 91.7148989367 0.127167607844 1.74769245283 92.6445955772 0.103219044797 1.6173482964 93.5837163773 0.0874018686515 1.53402282533 94.5323568679 0.0623713849927 1.41354470995 95.4906135483 0.0364179940071 1.29840677774 96.458583896 0.0187450877666 1.22559638965 97.4363663766 -0.00949174127426 1.12330349671 98.4240604539 -0.0398582736774 1.03421052218 99.4217665999 -0.0611477290334 0.983588119814 100.429586305 -0.105577896037 0.907539756872 101.447622088 -0.128693213494 0.884900467365 102.475977509 -0.163801038224 0.870378026228 103.514757174 -0.198455535554 0.888153981126 104.564066753 -0.221377074785 0.914295687477 105.624012985 -0.265235804122 1.00210082351 106.694703693 -0.28554472063 1.06250454894 107.77624779 -0.322294805704 1.21239234621 108.868755296 -0.338073216565 1.29831360592 109.972337345 -0.364380427084 1.48514166178 111.087106196 -0.375037525793 1.58294875727 112.21317525 -0.391990284291 1.77727347388 113.350659053 -0.398480749345 1.87235742469 114.499673315 -0.407776194484 2.05405455546 115.660334918 -0.412376256115 2.18025468465 116.832761929 -0.415871836064 2.29949200045 118.017073611 -0.419174783406 2.44667337745 119.213390438 -0.420522653559 2.51724290262 120.421834103 -0.422709526681 2.65795774064 121.642527533 -0.423699967054 2.76587461201 122.875594903 -0.424 2.87735888037 124.121161644 -0.422714743014 3.03467821991 125.37935446 -0.41991912954 3.1589380739 126.65030134 -0.412757911468 3.32960405729 127.934131569 -0.40448886319 3.45795844767 129.230975743 -0.388979211643 3.62243205046 130.540965781 -0.373209367737 3.73188986839 131.864234942 -0.348910370412 3.85802697924 133.200917832 -0.321070033909 3.9483749586 134.551150425 -0.291388787791 3.99801945852 135.915070072 -0.268974029818 4.01110366772 137.292815515 -0.240534326314 3.99161339286 138.684526903 -0.22079598036 3.95523624935 140.090345808 -0.197529318103 3.88515745872 141.510415233 -0.178764603208 3.79943910663 142.944879635 -0.164515864309 3.70707750696 144.393884932 -0.153653509821 3.61775080582 145.857578523 -0.145064579263 3.53773090093 147.336109299 -0.137987445804 3.47022871925 148.829627663 -0.131568866453 3.41531048119 150.338285542 -0.124436509332 3.37000923798 151.862236401 -0.115877625957 3.3277430644 153.401635262 -0.102641262469 3.2692329633 154.95663872 -0.0904727189126 3.2107432094 156.527404954 -0.0739818856513 3.11532997688 158.114093749 -0.060704937656 3.01520031511 159.71686651 -0.0482506990987 2.8935002794 161.335886276 -0.0362136799498 2.71257369553 162.971317741 -0.0297815602932 2.54943338661 164.623327265 -0.0260562010063 2.3280061909 166.292082899 -0.027623774824 2.13933830237 167.977754394 -0.0361617547339 1.8981792091 169.680513223 -0.0484385766641 1.70619516986 171.400532598 -0.0697982576959 1.47376822593 173.137987485 -0.0997354769288 1.26551589169 174.893054624 -0.129110354865 1.12472431524 176.665912548 -0.18069468952 0.971468976794 178.456741598 -0.218968708754 0.918242371045 180.265723945 -0.278693085289 0.934218708602 182.093043606 -0.317305475248 1.00972346804 183.93888646 -0.368199351178 1.21194127577 185.803440277 -0.394526479581 1.39246174495 187.686894723 -0.41990208341 1.70118560788 189.589441392 -0.426592229866 1.90883939482 191.511273818 -0.424555805417 2.17746071711 193.452587498 -0.415306814563 2.33533362821 195.413579907 -0.403371673229 2.44716843997 197.394450528 -0.397298281408 2.48356447746 199.39540086 -0.401596996789 2.4910422144 201.416634449 -0.416167492073 2.51068127827 203.458356901 -0.441934949735 2.59787669766 205.520775909 -0.466416527105 2.7502457334 207.60410127 -0.49180666171 3.04950152185 209.708544907 -0.500580861911 3.38071212553 211.834320893 -0.492201193475 3.81541014557 213.981645469 -0.460459656831 4.22973956353 216.150737069 -0.409941006361 4.55797245556 218.341816342 -0.348732118729 4.75596649929 220.555106173 -0.287131100277 4.80851271214 222.790831705 -0.234058309752 4.74891777855 225.049220366 -0.193935772974 4.62646108971 227.330501887 -0.16534694963 4.47251607056 229.634908328 -0.150923267723 4.37815953781 231.962674103 -0.137744321813 4.32789341051 234.314036001 -0.123271355361 4.33106921757 236.689233211 -0.102631104436 4.34719016114 239.088507348 -0.0703665557142 4.33476823193 241.512102474 -0.0399145522487 4.27717307036 243.960265127 -0.00602839645812 4.14335312674 246.433244344 0.0205840999338 3.94995572533 248.931291684 0.0365099965206 3.76723636688 251.45466126 0.0472983313687 3.52663726976 254.003609757 0.0501086610293 3.36290519612 256.578396464 0.0508219136272 3.16741422468 259.179283299 0.0495778135433 3.03032731456 261.806534834 0.0449617126413 2.85186139717 264.460418322 0.0367999037974 2.69900677024 267.141203726 0.0245985430976 2.55787130606 269.849163747 0.00569141798923 2.4301159017 272.584573848 -0.0129408903363 2.35578257726 275.347712286 -0.0343632559664 2.30565243499 278.138860137 -0.0545743334034 2.28377336245 280.958301328 -0.0714323893288 2.27728273621 283.806322662 -0.0913611469665 2.28319436187 286.683213852 -0.110414069832 2.31380209406 289.589267546 -0.132689279481 2.38835055772 292.524779358 -0.15219977325 2.51308721779 295.490047899 -0.165451553748 2.69937500945 298.485374809 -0.168181512124 2.8757201706 301.511064784 -0.163773750773 3.05564892583 304.567425607 -0.15622353612 3.18463767719 307.654768183 -0.148780939487 3.2955374884 310.773406569 -0.141644041353 3.42071022965 313.923658005 -0.134443349604 3.54669219638 317.105842945 -0.122554675944 3.70609846161 320.320285095 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» 30 Juil 2014 19:51

Merci t es un chef :bravo:

Je posterais qq mesures pour partager !
Thx ced

» 30 Juil 2014 21:15

Je suis tout de même assez étonné par la résolution de vos fichiers de correction !

A titre de comparaison, voici le PV de mon micro (earthworks M30).

Il y a un fort filtrage appliqué.
Le fichier électronique correspondant reçu sur demande commence à 770Hz jusqu'à 34899Hz, le tout en seulement 55 points !

» 30 Juil 2014 21:18

Certains travaillent à la NASA et d'autres à la Poste...

» 30 Juil 2014 21:18

Comme pour toute mesure il faut se demander en effet quelle est la resolution/precision reelle...
Dans ce cas de figure on peut se dire qu'un micro n'a pas de raison d'avoir de telles variations sur une bande etroite, et qu'une correction plus lissee, de la "tendance", a plus de chance d'etre valable.

» 30 Juil 2014 21:38

palm a écrit:Dans ce cas de figure on peut se dire qu'un micro n'a pas de raison d'avoir de telles variations sur une bande etroite, et qu'une correction plus lissee, de la "tendance", a plus de chance d'etre valable.

C'est ce que je me dit. Je ne vois pas comment un micro pourrait avoir de tel accidents à Q élevé sur la réponse.
J'ai également un ECM8000 et je n'ai pas vu d'écarts de ce type entre les 2.