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AFMG Network Forum Index -> AFMG EASERA -> Absolute Measurements    View previous topic :: View next topic  Absolute Measurements Posted: Mon Nov 14, 2005 2:14 pm Tobi @ Fohhn Audio AG Member   Joined: 25 Oct 2005 Posts: 13 Hi, how can I measure the absolute SPL of different loudspeakers with EASERA, e.g. 1W at one meter on a 4Ohm Speaker ?? Tobi Posted: Tue Nov 15, 2005 2:47 pm Stefan Member   Joined: 19 Apr 2005 Posts: 167 Location: Berlin, Germany Hi Tobi, if you have calibrated the input properly you can use the Live RTA to see the true input levels. On the other hand, if everything (in & out) is properly calibrated, EASERA will also show the transfer functions in View&Calc with the right level. Note that this data is normalized to 1V peak. That means to keep measurements comparable, both input and output gains (and clip voltages) are compensated for. So, if you apply a sine signal with 1V Peak you see the same levels at the input as in the transfer function display of EASERA. We currently work on a more thorough documentation of this topic along with a program update in order to make this clearer. Stefan Posted: Sun Feb 12, 2006 5:57 am Ron Sauro Member   Joined: 29 Oct 2005 Posts: 27 Location: Elma, Wa Hi Tobi... If you use sweep or log sweep...you should look at the digital output gain level and then place the inverse into the input gain area in the lower left window.... EG..... if the DOG is -15db then the input gain should be +15db Ron Sauro NWAA Labs www.nwaalabs.com Posted: Sun Feb 12, 2006 9:32 am Stefan Member   Joined: 19 Apr 2005 Posts: 167 Location: Berlin, Germany Hi, Ron is right, at present EASERA considers the digital output gain (DOG) as part of the known measurement chain and therefore compensates for it in post-processing. For measuring real sensitivity levels, the easiest way to go is indeed to adjust the DOG to your needs and then to "counter-compensate" it using the field for external gain. We will have a switch for this functionality in one of the next updates. Stefan AFMG Network Forum Index -> AFMG EASERA You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT   Page 1 of 1   All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Select a forum General----------------Board RulesForum Announcements Software Forums----------------EASE 5EASE 4EASE EvacAFMG EASERAAFMG SysTuneAFMG SoundFlowAFMG ReflexEASE FocusEASE AddressSDK for GLL PLug-in API   Powered by phpBB © 2001-2003 phpBB Group Theme created by Vjacheslav Trushkin Variation by CodeWeavers and AFMG