Recent content by Pinox67

For those who have access to AES publications, here you will find an in-depth analysis (in terms of mathematical models and simulation results) of the topics discussed in this thread. It is not an easy read...

I'm preparing simulations to answer these questions. It will take a bit 'of time...

I have already answered on the relationship between aspects related to ITD/ILD and transient steepness: the latter changes the flow of information that reaches our brain to process spatial information. Your reasoning is correct if we analyze the signal in its entirety. But our ear doesn't know...

You break through an open door with me...:) In my studies I have always tried to run tests with "music-like" signals (you can find an example in this link). But to highlight phenomena, it is always necessary to start from simple signals.

Good question. ITD and ILD are based on an operation analogous to a cross-correlation between the signals that reach the brain from our two ears. Now, any phase shift between the channels of the ITD value, let's say about 5usec which corresponds to 1 sample for a 192KHz sampling, can be...

I think there is some confusion. One thing is that for a signal limited in audio bandwidth, the sampling rate of 44KHz is able to reproduce with high precision the instant in which a transient occurs (110psec, although I should elaborate on how this value is calculated), which exceeds the level...

I can't find the main articles on the fly. However you can search the web for "Interaural Time Difference" (or Level). As already reported, you can also find a lot in good psychoacoustic books. A very interesting one that I suggest is "Principle of Cognitive Neuroscience", by D. Purves and...

Correct, the temporal aspects of the transients are preserved in this case. I ran some simulations too.

If you read the texts that talk about these experiments, you can see that the ITD/ILD values that we are able to detect depends on several aspects, such as the frequencies in the sound, spectral complexity, background noise. And it doesn't seem like a surprise to me.

This is something that puzzled me too at first. The 20KHz bandwidth is related to the spectral analysis of the sound performed by the cochlea, to determine its "timbre". But for localization aspects, for which signal time arrival and differential time/or signal levels between ears (ITD and ILD)...

Even when I listen to music in the car or with the iPod, I can hardly tell if it's mp3 quality (naturally with little compression) or CD, and I'm happy about it. But these are not listens that I consider "quality". Comparisons must be made on quality playback chain, controlled environments and...

Yes, I had already seen this interesting video some time ago. But the theme here is slightly different: we are talking about the time spread of transients when switching from signals with a high sampling frequency to a lower one and the fact that our auditory system could detect this effect in...

It's certainly not me... it's what you find in scientific texts that talk about these aspects.

I have found several sites, articles and tests on the web in which it is claimed that the CD quality music distribution format, 16bit/44KHz, is more than sufficient to preserve practically all the characteristics of the sound compared to higher resolution formats. 24bit/sample and higher sample...

A friend pointed out some problems to me in the post#46 about dynamic model simulations. On a later review of the model implementation, I indeed found a calculation error that skewed some results. So I rewrote most of the post, making the necessary corrections. The conclusions are no so...