Re: Listening Get Together
You will get "data"-it just doesn't mean much of anything if the window is to small. The shown data can vary over a huge range-and in some cases make the "measured" response look worse than it actually is.
What I like to do is to use a resolution that is 1/10th of the lowest expected freq of the cabinet.
So it the expected low freq is 50hz-I like to have 5 hz resolution.
It is one thing to "measure" a cabinet-and quite another to do it properly and display it properly.
When a graph that is displayed and is obviously full of "errors" (such as going out to 100KHz for a loudspeaker), to me that says that the person "measuring" doesn't know what they are doing-so I cannot trust any of the "data".
And showing low freq with a short time window-is the "data" actually showing the response or just the noise of something nearby-did the person measuring have enough signal to noise ratio-or did they just "accept" what was shown on the screen as being accurate?
You should ALWAYS QUESTION your measurement. But that of course requires a knowledge of what you are doing and being able to tell if the data is valid or not.
If you don't know what to show-then how valid is it. Things like 100dB vertical scales are another indicator-what do you expect people to get from that?
Measurements are one thing-USEFUL measurements are quite another.
