51–58 of 58 posts
You need a calibrated measurement microphone to do this for real. Otherwise the microphone’s frequency response will skew the results.
You can still tell that from the coloring of a local reference mic.
I just want to point out that it's a pretty big leap to go from "I observed the same frequency response curve with two different inputs" to "there is no audible difference between the two inputs". There are many other measurements you would need to take to prove or disprove the hypothesis, such as signal to noise ratio and dynamic range. And even then you couldn't really prove it definitively due to the complexity of…
moreover, i'm not sure if/how something like THD relates to accuracy of reconstructing more complex naturalistic (i.e., non-sine wave) signals.
You need a calibrated measurement microphone to do this for real. Otherwise the microphone’s frequency response will skew the results.
iPhone mics are consistent enough to be used for most purposes. Apple provides the correction curves and they are used by apps like Audiotools
I just want to point out that it's a pretty big leap to go from "I observed the same frequency response curve with two different inputs" to "there is no audible difference between the two inputs". There are many other measurements you would need to take to prove or disprove the hypothesis, such as signal to noise ratio and dynamic range. And even then you couldn't really prove it definitively due to the complexity of…
> I eyeballed the two (red) plots and I think they look more or less identical. I overlaid those two images [0], and they seem significantly (though not hugely) different to me. Wouldn't speculate as to why that is though, without checking the consistency of passes with the same setup. 0 - https://imgur.com/a/7GUSmPW (with hue shift for comparison)
> I eyeballed the two (red) plots and I think they look more or less identical. I overlaid those two images [0], and they seem significantly (though not hugely) different to me. Wouldn't speculate as to why that is though, without checking the consistency of passes with the same setup. 0 - https://imgur.com/a/7GUSmPW (with hue shift for comparison)
This is useful, thanks. I should've done it on my own. And checking the consistency of passes would be a good idea too. If you don't mind, I'll update my blog post to include your overlaid image.