Audio directional cues
 

So I have an infection in my right ear, and am pretty much deaf on
that side right now. But I can place audio sources just as well as I
could with two functioning ears.

Speculate....

Marks....

Set....

Go

d

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Audio directional cues
 

Probably not completely deaf, and the cues are still there. Many times the
infection affects sounds inside your head more than those outside.
Brian

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"Don Pearce" wrote in message
...
So I have an infection in my right ear, and am pretty much deaf on
that side right now. But I can place audio sources just as well as I
could with two functioning ears.

Speculate....

Marks....

Set....

Go

d

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

Audio directional cues
 

Don Pearce wrote:

So I have an infection in my right ear, and am pretty much deaf on
that side right now. But I can place audio sources just as well as I
could with two functioning ears.

Speculate....


** If you are referring to real sources, not stereo images then it is nothing unusual.

Locating the direction of a typical sound source involves time of arrival differences at each ear - plus moving the head to bring them towards zero.

OTOH, the virtual image produced by a stereo pair of speakers requires the time difference to be eliminated first by sitting in the mid position, then level differences take over to give one the apparent direction.


.... Phil

Audio directional cues
 

Phil Allison wrote:

Don Pearce wrote:

So I have an infection in my right ear, and am pretty much deaf on
that side right now. But I can place audio sources just as well as I
could with two functioning ears.

Locating the direction of a typical sound source involves time of arrival differences at each ear - plus moving the head to bring them towards zero.

I did a final year project during which subjects with an ear
defender over one ear were repeatedly asked to select which
speaker in a semicircular array around them was the source of a
low level click.

Despite the literature showing claims of some ability to do this,
my tests indicated otherwise. This may well have been due to a
learning process and/or the actual sound levels.

Chris
--
Chris J Dixon Nottingham UK


Plant amazing Acers.

Audio directional cues
 

On Wed, 23 Nov 2016 20:19:46 -0800 (PST), Phil Allison
wrote:

Don Pearce wrote:

So I have an infection in my right ear, and am pretty much deaf on
that side right now. But I can place audio sources just as well as I
could with two functioning ears.

Speculate....


** If you are referring to real sources, not stereo images then it is nothing unusual.

Locating the direction of a typical sound source involves time of arrival differences at each ear - plus moving the head to bring them towards zero.

OTOH, the virtual image produced by a stereo pair of speakers requires the time difference to be eliminated first by sitting in the mid position, then level differences take over to give one the apparent direction.


... Phil




This is actually the stereo image from speakers.

d

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Audio directional cues
 

Chris J Dixon wrote:


Locating the direction of a typical sound source involves time of
arrival differences at each ear - plus moving the head to bring
them towards zero.

I did a final year project during which subjects with an ear
defender over one ear were repeatedly asked to select which
speaker in a semicircular array around them was the source of a
low level click.

Despite the literature showing claims of some ability to do this,
my tests indicated otherwise. This may well have been due to a
learning process and/or the actual sound levels.


** Sounds like a neat test of I don't know what. Maybe refraction effects of the head and face provide a degree of localisation, but as you found SFA.

With both ears exposed, I would expect people with good hearing to do the job easily - provided the room was large or approaching anechoic.




..... Phil

Audio directional cues
 

On 24/11/2016 07:29, Chris J Dixon wrote:
Phil Allison wrote:

Don Pearce wrote:

So I have an infection in my right ear, and am pretty much deaf on
that side right now. But I can place audio sources just as well as I
could with two functioning ears.

Locating the direction of a typical sound source involves time of arrival differences at each ear - plus moving the head to bring them towards zero.

I did a final year project during which subjects with an ear
defender over one ear were repeatedly asked to select which
speaker in a semicircular array around them was the source of a
low level click.

Despite the literature showing claims of some ability to do this,
my tests indicated otherwise. This may well have been due to a
learning process and/or the actual sound levels.

If your head is in a fixed position then it is very difficult, even with two ears, to locate sounds.

--
Eiron.

Audio directional cues
 

Eiron wrote:


If your head is in a fixed position then it is very difficult, even with
two ears, to locate sounds.



** To really *locate* an invisible sound source, you need to walk around and find it. But that is NOT the question.

One can usually nominate the direction of a source, which IS the topic, with the head held still long as the sound discontinuous and has high frequency components.

Stereo sound is heard perfectly by listeners with still heads, or even wearing headphones.



..... Phil

Audio directional cues
 

On Thu, 24 Nov 2016 03:00:52 -0800 (PST), Phil Allison
wrote:

Eiron wrote:


If your head is in a fixed position then it is very difficult, even with
two ears, to locate sounds.



** To really *locate* an invisible sound source, you need to walk around and find it. But that is NOT the question.

One can usually nominate the direction of a source, which IS the topic, with the head held still long as the sound discontinuous and has high frequency components.

Stereo sound is heard perfectly by listeners with still heads, or even wearing headphones.



.... Phil





That is the essence of it. To be easily located, the sound needs to
have a lot of different frequency content - preferably in the form of
clicks. You can locate clicks easily in a reverberant space with many
speakers. Play a low-ish frequency sine wave through those same
speakers, and it is mostly a matter of luck whether you can locate it.

d

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Audio directional cues
 

In article , Phil
Allison wrote:
Chris J Dixon wrote:


Locating the direction of a typical sound source involves time of
arrival differences at each ear - plus moving the head to bring them
towards zero.

I did a final year project during which subjects with an ear defender
over one ear were repeatedly asked to select which speaker in a
semicircular array around them was the source of a low level click.

Despite the literature showing claims of some ability to do this, my
tests indicated otherwise. This may well have been due to a learning
process and/or the actual sound levels.


** Sounds like a neat test of I don't know what. Maybe refraction
effects of the head and face provide a degree of localisation, but as
you found SFA.

For real sources (as distinct from 2-speaker stereo) I think I recall
reading somewhere that we can detect direction using one ear for the
reasons you give - including the shape of the external ear 'lobes'. But I
assume this depends a lot on the person and the type of sound. And I've
never tested this myself.

Jim

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