sciguy
New Member
- Joined
- Oct 3, 2018
- Messages
- 2
- Likes
- 8
Hello,
I have recently stumbled upon this forum and am absolutely baffled. This place is awesome and exactly what I've been looking for.
Now to the meat of my post, this question may largely be targeted at amirm, but I would like anyone's input.
What is the feasibility of running intermodulation distortion testing on multiple tones at once? I see you use the Audio Precision APX555. It seems to be a very capable unit. I have always had a vision of running a 20-tone intermodulation test. Injecting 20 tones separated by half octaves from 20hz to 20khz, then measuring distortion in a similar way to how it seems that you do SINAD. To me this seems like a more ideal stress test for audio equipment, as a true music signal could have hundreds or thousands of tones of varying level that must be reproduced. Is this a feasible test? Is there something I'm not thinking of that makes this test impossible or impractically difficult?
I have recently stumbled upon this forum and am absolutely baffled. This place is awesome and exactly what I've been looking for.
Now to the meat of my post, this question may largely be targeted at amirm, but I would like anyone's input.
What is the feasibility of running intermodulation distortion testing on multiple tones at once? I see you use the Audio Precision APX555. It seems to be a very capable unit. I have always had a vision of running a 20-tone intermodulation test. Injecting 20 tones separated by half octaves from 20hz to 20khz, then measuring distortion in a similar way to how it seems that you do SINAD. To me this seems like a more ideal stress test for audio equipment, as a true music signal could have hundreds or thousands of tones of varying level that must be reproduced. Is this a feasible test? Is there something I'm not thinking of that makes this test impossible or impractically difficult?