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What parameters and equipment is required for gen test of speakers

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Edp

In Reply to: RE: To the degree a loudspeaker is accurate... posted by tomservo on April 16, 2023 at 08:04:40

I've never done that type of testing with a loudspeaker.

If emphasis and faults can be found after couple generations, could help refine the hard to refine.

What conditions (like test environment to reduce room interactions), what level of quality for recording (tape vs hard drive, mic type and it quality), what is the frequency limits due to measurement (like bass below 200 needs to be spliced in vs above 200 type deal)

Any docs or websites that might fill in details without having to bug all here or that dont need 10 years of experience in reading doctoral thesis skills?

I can see benefit, but also could envision details required to implement the test correctly could be very specific and detailed.

Follow Ups:

RE: What parameters and equipment is required for gen test of speakers - tomservo 10:25:16 04/16/23 (1)
Hi
Well the Generation loss test was very popular in the days of recording tape for the same reasons. We started doing this at work out of curiosity as much as anything else about 18 years ago.

What we did was use a measurement mic and a 24/96 recorder.

We put the speaker on top of a ladder with the microphone at a meter.
We played a section of music (parts of several tracks edited together) and recorded the mic signal (and in the beginning we also made a gen loss copy of the music track but after 5 generations there was no detectable difference in the direct audio so we stopped that and just did the speakers).

Now days i would skip the MI recorder and get a Motu m2 or other good usb interface and a decent measurement mic. IF you have a set of good headphones, there is something important you can discover too.

They did an interview for a recording magazine at work and some of it was edited into a video that goes into the gen loss test and some on how we hear.
Hope this video makes sense.

https://www.youtube.com/watch?v=4tE8yVtw1-o&t=2s
- How we hear etc (Open in New Window)
- Appreciate info - Edp 13:32:29 04/16/23 (0)
  Up high outside "chamber" and normal mic requirements and distance.
  
  Will give a shot , thanks for idea/ info

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