3rd gen entune audio curve graph

One of the files (3rd from last) in the google dropbox I posted above - log plot. Note that it doesn't drop @ 18 kHz like the youtube version and is much steeper

 

Linear version of that plot

 

This is what I got from playing the Youtube "Pink Noise HQ Audio" video. I checked it on the Ivie and the Smaart and got the same results. I also got the same response from the AudioCheck test tones pink noise. I'm not sure about the steady rise starting at 1K, I presumed it would be flat. It could be related to the calibration of my input module for the microphone I use with it, or something with my laptop sound card, since that was the source I had to use. I can't really explain it though.

That's just a literal plot of what pink noise actually is, inverse power to frequency. It doesn't sound like that because of how the human hears different frequencies. You need more power to have the perception of equal volume in lower frequencies compared to high ones. The RTA calculates differently than what Audacity will plot for pink noise.

 

Totally although it does illustrate that there are differences in test files/sources. Yeah, I think you're right - Audacity, AFAIK, does not incorporate a simulation for human perception. If it exists, I haven't found it. Thanks for the intro to Smaart - gonna give that demo a go.

 

Smaart is about the most difficult software to use because of all of the calibration and settings you have to configure to use it. It's really powerful though, and obviously $pendy. If it wasn't for work I wouldn't have it.

 

Using the RTA function in REW - peak plot of 10 second samples

Youtube file



Dropbox file

 

I thought this was an interesting look at it from Five Star Car Stereo. I definitely hear the difference in the rear speakers compared to the front. But the bass boost and roll off must be more subtle than I can notice by ear. Although I do notice the mids and highs sky rocket when I pass volume 48-50 on the radio.