Recent content by Keith_W

Phase does not matter as long as there is no dip in the frequency response.

Re: "phase issues". Not sure what you mean. If your phase graph looks like a complete mess, right click the graph in the "Phase & SPL" window, and choose "Estimate IR Delay". But I wouldn't bother looking at the phase graph unless there is something specific you want to look at. Re: "nearfield...

MLS is a type of test signal, kind of like a broadband noise. Its advantage is speed, its disadvantage is poor SNR, sensitivity to nonlinearities and gating. AFAIK REW does not have MLS.

Your RME HDSPE AES32 has analog inputs. A bit of googling says that your microphone is prepolarized, meaning it does not need to be charged with 48V Phantom Power. I would suggest you connect your microphone to your RME card instead of your PC's 3.5mm analog input. You will need an appropriate...

Oh boy. Buckle up for this one, it is going to get very complex and you are very likely to fail. Some observations about your setup: 1. The MM01 is an XLR microphone, you did not mention how it is connected to your PC. 2. You are running antiquated software, a very old version of Windows and an...

What is there to say? You chopped off the labels, we don't know what those graphs mean. There is plenty of accuracy in a consumer-grade measurement setup. The only question is whether you can take free-field anechoic measurements - and that depends on how low your centre speaker goes, the size...

If your speaker has dual binding posts, you could try disconnecting the woofer.

All of REW's smoothing options are different types of spectral envelope. Read the relevant section in the REW manual here. To understand what spectral envelope is, maybe an analogy is in order. Suppose you were given a furry dog (the raw measurement) and asked to say whether it is fat or thin...

Please make sure you read and understand the replies before you make any more posts. 1. If you want to measure the FR of your glasses speakers, you need to measure using a HEADPHONE TEST FIXTURE. NOT an omnidirectional microphone. This means that the microphone is located inside an ear canal...

You need to provide more context into what you are measuring, how you set up your measurement, whether you loaded a calibration file, what mic you are using, how you pointed the mic, and so on. All I can see is a bizarre looking upward curve. All this is described in Book 2 of that eBook I...

Please refer to the REW help index and the free REW eBook (you want Book 2) for general questions about how to use REW and how to interpret measurements. REW check levels procedure Taking sweeps with REW This will be more difficult. You will need (1) a calibrated omnidirectional...

This is not a trivial exercise. You will need special test equipment and the ability to dismantle the glasses to test the mic and speaker responses independently. For the mic, it's not only the frequency response which is important, it is also the polar response. For the speakers, you will...

Just leave your settings the way they are. You only need to adjust the analysis settings if you are doing something pretty advanced. You can read the Wikipedia entry on window functions and how it reduces spectral leakage. If you go to the impulse response and click "Window", you will see the...

This page will answer all your questions.

Please read book 2 ("REW Advanced") of the free REW guide here. In a nutshell, there are no good reasons for beginners to look at the phase graph, because problems with phase will manifest in the SPL graph. The only reason to look at phase is to diagnose problems in the SPL graph.