...@music.vt.edu]
Im Auftrag von Junfeng Li
Gesendet: Sonntag, 17. April 2011 03:28
An: Surround Sound discussion group
Betreff: [Sursound] distance perception in virtual environments
Dear list,
I am now wondering how to subjectively evaluate distance perception in
virtual environments which might
Helmut Oellers oell...@syntheticwave.de wrote:
2011/4/26 Dave Malham d...@york.ac.uk
On 24/04/2011 19:11, Helmut Oellers wrote:
...modern computers are also clever. Today nothing is unaccountable if we
know the formula and all variables.
That's a BIG assumption - and given the
Actually, the butterfly flap thing is not really good either.
In chaos, things do not cause other things. The system is
essentially noncausal.
This is a trick point. But if a system depends unstably
on its initial state, it makes no real sense to say that it
depends on its initial state at all
...modern computers are also clever. Today nothing is unaccountable if we
know the formula and all variables. Audio is no mysterious. The complete
sonic field would be calculatable. The only problem is the huge amount of
variables. In principle, yet, we are able to calculate any wave front of
Hi David,
you are not alone in your insigthes. Some single discrete reflections are
the most important fact for estimation of source distance.
There exist research from Helmut Wittek, who was proven, play the
reverberation from four different directions is absolutely sufficient. We
cannot use the
On 17/04/2011 02:28, Junfeng Li wrote:
Dear list,
I am now wondering how to subjectively evaluate distance perception in
virtual environments which might be synthesized using WFS or HOA (high-order
ambisonics). In my experiments, the sounds were synthesized at different
distances and presented
Richard Lee rica...@justnet.com.au wrote:
You must simulate at least 2 things.
...
You have to simulate early reflections and a reverb pattern appropriate to
source distance. MAG has a paper on this under Distance Panners from an
idea by Peter Craven.
MAG's paper is:
M.A. Gerzon, The Design
,
Markus
On 17 avr. 2011, at 19:38, Dave Hunt wrote:
Hi,
Date: Sun, 17 Apr 2011 09:28:28 +0800
From: Junfeng Li junfeng.li.1...@gmail.com
Subject: [Sursound] distance perception in virtual environments
Dear list,
I am now wondering how to subjectively evaluate distance perception
That's an interesting question. The environment you're working in for
synthesis could matter quite a bit. That is, if your working in, or
simulating, an environment with little reverberation it is harder to judge
distance since direct-to-reflected energy ratio is an important cue. The
other
and
reproduction.
Ralph Glasgal
www.ambiophonics.org
From: Junfeng Li junfeng.li.1...@gmail.com
To: Surround Sound discussion group sursound@music.vt.edu
Sent: Saturday, April 16, 2011 9:28 PM
Subject: [Sursound] distance perception in virtual environments
Dear list,
I am now wondering how
You must simulate at least 2 things.
At close range, you must simulate the curvature of the soundfield. This is
simply proximity for 1st order and the effect is, if anything, exaggerated.
see the Appendix of
Is My Decoder Ambisonic, Heller et al, AES San Francisco 1980 aka BLaH3
See Daniel
I hope you have a control where you measure real distance perception too.
Not having a real control is a fault in many localisation experiments.
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