SR-1 measurements
https://www.innerfidelity.com/images/StaxSR1.pdf
Re impulse and step response, all headphones have issues. Oscillating impulse and step response.
The whole list
Headphone Measurements | InnerFidelity
I tried another, smaller headphones. The impulse response is faster - smaller transducer. Shape of positive and negative impulses is the same, so we may speculate if we hear phase inversion in some cases. However still the headphones are unable to follow the input impulse - no wonder.
P.S.: test file to test absolute phase audibility attached. Same impulses, positive and negative. No L/R shift. My ABX result is ZERO.
https://www.innerfidelity.com/images/StaxSR1.pdf
Re impulse and step response, all headphones have issues. Oscillating impulse and step response.
The whole list
Headphone Measurements | InnerFidelity
I tried another, smaller headphones. The impulse response is faster - smaller transducer. Shape of positive and negative impulses is the same, so we may speculate if we hear phase inversion in some cases. However still the headphones are unable to follow the input impulse - no wonder.
P.S.: test file to test absolute phase audibility attached. Same impulses, positive and negative. No L/R shift. My ABX result is ZERO.
Attachments
Who gets to sit on it ?......that reminds me of a story about the office girls sitting on the workshop beer fridge until they got found out lol.
Bluetooth Ottoman
Dan.
To a degree, but this sounds like mainly conjecture, it should be easy to test, the sound of a plane or geese flying across the sky, how does the brain interpret that played on headphones?
Perceived height information is mostly because of Y-axis speaker frequency dependent directivity and this again is grossly affected by crossover filter design and driver's placement and distance. Many side lobes are created and they contribute to perceived height "information".
Pavel, did you try this: John Curl's Blowtorch preamplifier part III.
Testing with impulses is difficult, I agree. Using a high passed step is more revealing as it contains sufficient low frequency energy.
Re HP measurements, the only way to do that correctly is to compare the response with a free-field incidence on-axis (to the ear, not the nose ;-), using the same dummy head with a mic in the ear canal.
I am not sure which file or link of that page to try? It leads me to BT thread page 403 with no test files.
Well, the default player for wav on my laptop did show the waveforms, so I knew straight away... And, I'd guessed what Pavel had done with the impulses. I could hear no difference with the ITD pairs, but that could well be the laptop affecting it. I could hear a difference with the inversions but then I could see that too so I'd declare that as not a good test!
I suspect - as Pavel subsequently showed, that the earbuds / windows almost certainly smeared the difference with the ITD delays. But then most systems will, I think that's part of Pavel's point.
As you know, the test impulses used have flat frequency spectrum from 20Hz to some 4kHz. -6dB at 10kHz, deep notches at 16, 32 and 48kHz 😉.
However I know what you mean.
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Always good when someone brings some humour into this thread.mountainman bob said:
More humour.johnego said:
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It seems you are unable to transfer one-dimensional v(t) microphone output into 3D acoustical imaging? Then you are no audiophile! 😉 😀
If you close your eyes, how will your brain interpret the sound of a plane or geese flying across the sky? May be it is not as obvious as one would have assumed?
Regarding headphones (i don't like/use headphones), because the position of the drivers/eardrums are fixed, the single mic idea has been implemented in binaural where mics are placed in dummy head. Why not try it by yourself?
If a mic is good, placed slightly above a drum, the cymbals should normally be at higher position than the drums and is recorded by the same mic. Reproduction of this recording should show that the cymbals are at higher position than the drum, like we often hear from a recording.
Regarding techniques to engineer effects digitally for headphones, i have no information. But once somebody showed me a site where we tried effects to our various headphones. I don't remember the site but i was surprised how they can move sound around like that. BTW, I listened with mono speaker the song Colour To The Moon by Allan Taylor. At the beginning there's HF sound moving around. When the speaker was on my right side the sound could be made to come from my left. 😕 😀
YouTube
I have spent my whole life working with illusions. To be skilled at creating them consistently takes a fair amount of objectivity, and a lot of technical training. And what may be a convincing illusion today may not be so tomorrow.
I'm talking about music recording. That's the best technique that i like and enjoy.
Pinnae transform mostly
I didn't realise you meant binaural recordings, ok
How do you work that out?
Yes, phase, frequency response manipulations can fool the ear by emulating pinnae transform etc
Read the works of David Chesky. Chesky Records have been my favorite since decades ago (especially with Sara K).
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