That's the true message your STEP is showing us. So what was "so fast" about your speaker? That first narrow peak of the STEP is that tweeter, that was finished playing before the mid even starts. So the mid's cannot be faster, as the delay can be seen in the wavelet.įrom 2.5 KHz down to 200 Hz your mid response is lagging behind the tweeter by almost half a millisecond. That's where your tweeter is first in the race. Here's the STEP response if the signal is ranging from zero HZ to infinity:Ĭlick to expand.What part of your frequencies is faster exactly? How can it be faster, faster than what? If it's presenting a single line at 0, that's the reference. Where it does deviate from that ideal is at the very top and bottom of it's spectrum, due to the roll off on both ends. Look at the Frequency response and Phase too!Ī speaker that shows a STEP like I posted is the quickest one can have (and still be right), as all signals arrive at the exact same point in time. Learn by applying some minimum phase filters and see what effect they have on the IR and STEP shape and form. Learn by downloading RePhase and create some different IR's yourself to see it's relation with STEP and FR/Phase. But that doesn't mean you can make up what it all means like you are doing in this thread. If you have the IR, you can calculate the others. Look at it as another way of presenting the same data. The STEP, IR and FR and Wavelet all show the same data. I gather your speaker doesn't have a "long step response" lol. Again, blue trace is the artificially modified magnitude response with much more energy in the sub region, but no change in phase:Ĭlick to expand.You couldn't be more wrong with this bit. The later part of the IR deviates more, as you'd expect from increased energy.Īnd here we have the two step responses. You can barely see the shift in the blue modified data, so here it is zoomed in. Here are the two impulse responses, overlaid The same cursors are visible, confirming identical phase at the adjusted frequencies: This modification is linear phase, as you can see here in the phase trace of both data sets. Markers are added to the traces to show the level increase over the original measurement. I then duplicated the trace, and edited the data directly to set the magnitude from 30 Hz to 200 Hz to a flat value at 91 dB. No post-processing windowing is applied.ĭue to the way Time Delay Spectrometry works, we can consider this to be about as a reflection-free measurement as possible in the circumstances.
Arc system 2.5 with mems microphone driver#
I measured a single Faital Pro 3FE22 driver resting on it's box on my desk, with an Earthworks M30 microphone at 10 centimetres, using an 87.4 second stimulus with the AFMG EASERA TDS module. Neither of them are ‘unidirectional’, as this would be a literal laser beam. This is stated by the manufacturers of both microphones themselves. Both of your microphones are omnidirectional.
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