loudspeaker stereo imaging
 

When I listen to some speakers, the stereo imaging is amazing - you can
pinpoint each member of the band on the stage infront of you, yet other
speakers do not have this property.

From a design point of view, how do you go about achieving superb stereo
imaging?

Thanks for any explanations...


Pete

loudspeaker stereo imaging
 

"Ewar Woowar" wrote in message
...
When I listen to some speakers, the stereo imaging is amazing - you can
pinpoint each member of the band on the stage infront of you, yet other
speakers do not have this property.

From a design point of view, how do you go about achieving superb stereo
imaging?

Thanks for any explanations...


Pete



earwax ;)

loudspeaker stereo imaging
 

"Ewar Woowar" wrote in message
...
When I listen to some speakers, the stereo imaging is amazing - you can
pinpoint each member of the band on the stage infront of you, yet other
speakers do not have this property.

From a design point of view, how do you go about achieving superb stereo
imaging?

Thanks for any explanations...


Pete



earwax ;)

loudspeaker stereo imaging
 

In article , Ewar Woowar
wrote:
When I listen to some speakers, the stereo imaging is amazing - you can
pinpoint each member of the band on the stage infront of you, yet other
speakers do not have this property.

From a design point of view, how do you go about achieving superb stereo
imaging?

Thanks for any explanations...

The requirements are probably:

Fairly flat response with no significant time/phase anomolies.

Controlled dispersion pattern that is fairly uniform as a function of
frequency. (See KH's article on Polar Patterns in this month's HFN.)

Relative absence of colourations or distortions.

Decent listening room acoustics.

Careful placement of speakers and listening location

Appropriately recorded source material.

A design like the Quad ESL's helps with the first few requirements, for the
others the loudspeaker designer is in your hands. :-)

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

loudspeaker stereo imaging
 

In article , Ewar Woowar
wrote:
When I listen to some speakers, the stereo imaging is amazing - you can
pinpoint each member of the band on the stage infront of you, yet other
speakers do not have this property.

From a design point of view, how do you go about achieving superb stereo
imaging?

Thanks for any explanations...

The requirements are probably:

Fairly flat response with no significant time/phase anomolies.

Controlled dispersion pattern that is fairly uniform as a function of
frequency. (See KH's article on Polar Patterns in this month's HFN.)

Relative absence of colourations or distortions.

Decent listening room acoustics.

Careful placement of speakers and listening location

Appropriately recorded source material.

A design like the Quad ESL's helps with the first few requirements, for the
others the loudspeaker designer is in your hands. :-)

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

loudspeaker stereo imaging
 

Ewar Woowar wrote:

When I listen to some speakers, the stereo imaging is amazing - you can
pinpoint each member of the band on the stage infront of you, yet other
speakers do not have this property.

From a design point of view, how do you go about achieving superb stereo
imaging?

Thanks for any explanations...


Pete


It has a lot to do with the positions of the HF and LF drivers and your
listening position. These result in errors which can muddy the stereo
sound field. The only real solution is to use dual concentric speakers.

Ian

loudspeaker stereo imaging
 

Ewar Woowar wrote:

When I listen to some speakers, the stereo imaging is amazing - you can
pinpoint each member of the band on the stage infront of you, yet other
speakers do not have this property.

From a design point of view, how do you go about achieving superb stereo
imaging?

Thanks for any explanations...


Pete


It has a lot to do with the positions of the HF and LF drivers and your
listening position. These result in errors which can muddy the stereo
sound field. The only real solution is to use dual concentric speakers.

Ian

loudspeaker stereo imaging
 

In article , Ian Bell
wrote:


It has a lot to do with the positions of the HF and LF drivers and your
listening position. These result in errors which can muddy the stereo
sound field. The only real solution is to use dual concentric speakers.

Interesting. I'd suspect most people wouldn't immediately think of the Quad
ESL63's as 'dual concentric'. :-) More like 'multiple quasi-concentric' or
'phased array', though. They image quite well, though.

The ESL57's (which are not 'concentric') do also seem to image very well,
Given the above, it seems reasonable to think that there are alternative
approachs to 'put the tweeter in the middle of the woofer' that can work...
;-

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

loudspeaker stereo imaging
 

In article , Ian Bell
wrote:


It has a lot to do with the positions of the HF and LF drivers and your
listening position. These result in errors which can muddy the stereo
sound field. The only real solution is to use dual concentric speakers.

Interesting. I'd suspect most people wouldn't immediately think of the Quad
ESL63's as 'dual concentric'. :-) More like 'multiple quasi-concentric' or
'phased array', though. They image quite well, though.

The ESL57's (which are not 'concentric') do also seem to image very well,
Given the above, it seems reasonable to think that there are alternative
approachs to 'put the tweeter in the middle of the woofer' that can work...
;-

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

loudspeaker stereo imaging
 

jim, thanks for that, i thought it might be to do with phase and polar
patterns.

i guess a wide dispersion pattern flat over frequency, same signal coming
from 2 speakers would mimic similar sound waves to a single actual source
located in the middle. thinking back to o'level physics, i guess you could
get a tray full of water and compare two pulsating bobs (two omnidirectional
speakers) with one pulsating bob in the middle and compare the waves
arriving at an equidistant point (the listener).


Fairly flat response with no significant time/phase anomolies.

Controlled dispersion pattern that is fairly uniform as a function of
frequency. (See KH's article on Polar Patterns in this month's HFN.)

Relative absence of colourations or distortions.

Decent listening room acoustics.

Careful placement of speakers and listening location

Appropriately recorded source material.

loudspeaker stereo imaging
 

jim, thanks for that, i thought it might be to do with phase and polar
patterns.

i guess a wide dispersion pattern flat over frequency, same signal coming
from 2 speakers would mimic similar sound waves to a single actual source
located in the middle. thinking back to o'level physics, i guess you could
get a tray full of water and compare two pulsating bobs (two omnidirectional
speakers) with one pulsating bob in the middle and compare the waves
arriving at an equidistant point (the listener).


Fairly flat response with no significant time/phase anomolies.

Controlled dispersion pattern that is fairly uniform as a function of
frequency. (See KH's article on Polar Patterns in this month's HFN.)

Relative absence of colourations or distortions.

Decent listening room acoustics.

Careful placement of speakers and listening location

Appropriately recorded source material.

loudspeaker stereo imaging
 

"Ian Bell" wrote in message
...
Ewar Woowar wrote:

When I listen to some speakers, the stereo imaging is amazing - you can
pinpoint each member of the band on the stage infront of you, yet other
speakers do not have this property.

From a design point of view, how do you go about achieving superb stereo
imaging?

Thanks for any explanations...


Pete


It has a lot to do with the positions of the HF and LF drivers and your
listening position. These result in errors which can muddy the stereo
sound field. The only real solution is to use dual concentric speakers.

Ian



Another strange point: speakers with two drivers almost always produce a
better and more sharply defined stereo image than those with three drivers.
Try a LS3/5a against a Spendor BC1 and you'll see what I mean.


--
Woody

loudspeaker stereo imaging
 

"Ian Bell" wrote in message
...
Ewar Woowar wrote:

When I listen to some speakers, the stereo imaging is amazing - you can
pinpoint each member of the band on the stage infront of you, yet other
speakers do not have this property.

From a design point of view, how do you go about achieving superb stereo
imaging?

Thanks for any explanations...


Pete


It has a lot to do with the positions of the HF and LF drivers and your
listening position. These result in errors which can muddy the stereo
sound field. The only real solution is to use dual concentric speakers.

Ian



Another strange point: speakers with two drivers almost always produce a
better and more sharply defined stereo image than those with three drivers.
Try a LS3/5a against a Spendor BC1 and you'll see what I mean.


--
Woody

loudspeaker stereo imaging
 

harrogate wrote:


"Ian Bell" wrote in message
...
Ewar Woowar wrote:

When I listen to some speakers, the stereo imaging is amazing - you can
pinpoint each member of the band on the stage infront of you, yet other
speakers do not have this property.

From a design point of view, how do you go about achieving superb
stereo imaging?

Thanks for any explanations...


Pete


It has a lot to do with the positions of the HF and LF drivers and your
listening position. These result in errors which can muddy the stereo
sound field. The only real solution is to use dual concentric speakers.

Ian



Another strange point: speakers with two drivers almost always produce a
better and more sharply defined stereo image than those with three
drivers. Try a LS3/5a against a Spendor BC1 and you'll see what I mean.




I'll stick with my Tannoy Monitor Golds thanks all the same.

Ian

loudspeaker stereo imaging
 

harrogate wrote:


"Ian Bell" wrote in message
...
Ewar Woowar wrote:

When I listen to some speakers, the stereo imaging is amazing - you can
pinpoint each member of the band on the stage infront of you, yet other
speakers do not have this property.

From a design point of view, how do you go about achieving superb
stereo imaging?

Thanks for any explanations...


Pete


It has a lot to do with the positions of the HF and LF drivers and your
listening position. These result in errors which can muddy the stereo
sound field. The only real solution is to use dual concentric speakers.

Ian



Another strange point: speakers with two drivers almost always produce a
better and more sharply defined stereo image than those with three
drivers. Try a LS3/5a against a Spendor BC1 and you'll see what I mean.




I'll stick with my Tannoy Monitor Golds thanks all the same.

Ian

loudspeaker stereo imaging
 

On Wed, 12 Nov 2003 18:40:18 -0000, harrogate wrote:

Another strange point: speakers with two drivers almost always produce a
better and more sharply defined stereo image than those with three drivers.
Try a LS3/5a against a Spendor BC1 and you'll see what I mean.

An exception to that is the ATC SCM300As (which have four drive units),
which produce the most incredible stereo image that I have ever heard:

http://www.google.com/groups?selm=un...news.com&oe =
UTF-8&output=gplain

--
Anthony Edwards

loudspeaker stereo imaging
 

On Wed, 12 Nov 2003 18:40:18 -0000, harrogate wrote:

Another strange point: speakers with two drivers almost always produce a
better and more sharply defined stereo image than those with three drivers.
Try a LS3/5a against a Spendor BC1 and you'll see what I mean.

An exception to that is the ATC SCM300As (which have four drive units),
which produce the most incredible stereo image that I have ever heard:

http://www.google.com/groups?selm=un...news.com&oe =
UTF-8&output=gplain

--
Anthony Edwards

loudspeaker stereo imaging
 

In article , Ewar Woowar
wrote:
jim, thanks for that, i thought it might be to do with phase and polar
patterns.

i guess a wide dispersion pattern flat over frequency, same signal
coming from 2 speakers would mimic similar sound waves to a single
actual source located in the middle. thinking back to o'level physics,
i guess you could get a tray full of water and compare two pulsating
bobs (two omnidirectional speakers) with one pulsating bob in the middle
and compare the waves arriving at an equidistant point (the listener).

Yes, however this does not necessarily mean that 'point sources' that
radiate uniformly in all directions are always ideal. Speakers that
approach having a 'planar' radiation pattern which 'beams' the signals
towards the listener may be better. Depends upon the details.

The problem is that when speakers radiate sounds into the room, some then
reflects from the walls, furniture, etc. If the speaker's polar pattern
varies in a complicated, uncontrolled, way with frequency, the result is a
speaker-imposed frequency-dependent variation in the amount of indirect
sound reaching the listener. This can have the effect of shifting the image
in a complex frequency-dependent manner.

Bit like looking at a photo where the colours are all 'out of alignment'.
:-)

Having speakers whose patterns are relatively frequency independent means
the speakers are not having the above effect as they are distributing the
power in much the same way at all frequencies. There may still be effects
due to the room, etc, having a frequency-dependent behaviour, though. Hence
the problem may be reduced, but not removed.

By having sources that tend to 'beam' at the listener, you get a higher
direct-to-indirect ratio, so can reduce the effect.

The above is argued to be one of the reasons why speakers like the Quad
electrostatics can provide good imaging. However other types can also
deliver good performance provided that they, and the room, etc, all are
doing a decent job. Hence there may be more than one way to deal with this
problem. There are various reasons why 'beaming' is problematic in
practice, so it can have drawbacks that may mean another approach ends up
being preferred.

And in the end, of course, the source material has to provide the signals
that can then be used to create a decent image. If the recording/broadcast
is crap in this respect, then even excellent speakers can't give you a good
image. :-)

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

loudspeaker stereo imaging
 

In article , Ewar Woowar
wrote:
jim, thanks for that, i thought it might be to do with phase and polar
patterns.

i guess a wide dispersion pattern flat over frequency, same signal
coming from 2 speakers would mimic similar sound waves to a single
actual source located in the middle. thinking back to o'level physics,
i guess you could get a tray full of water and compare two pulsating
bobs (two omnidirectional speakers) with one pulsating bob in the middle
and compare the waves arriving at an equidistant point (the listener).

Yes, however this does not necessarily mean that 'point sources' that
radiate uniformly in all directions are always ideal. Speakers that
approach having a 'planar' radiation pattern which 'beams' the signals
towards the listener may be better. Depends upon the details.

The problem is that when speakers radiate sounds into the room, some then
reflects from the walls, furniture, etc. If the speaker's polar pattern
varies in a complicated, uncontrolled, way with frequency, the result is a
speaker-imposed frequency-dependent variation in the amount of indirect
sound reaching the listener. This can have the effect of shifting the image
in a complex frequency-dependent manner.

Bit like looking at a photo where the colours are all 'out of alignment'.
:-)

Having speakers whose patterns are relatively frequency independent means
the speakers are not having the above effect as they are distributing the
power in much the same way at all frequencies. There may still be effects
due to the room, etc, having a frequency-dependent behaviour, though. Hence
the problem may be reduced, but not removed.

By having sources that tend to 'beam' at the listener, you get a higher
direct-to-indirect ratio, so can reduce the effect.

The above is argued to be one of the reasons why speakers like the Quad
electrostatics can provide good imaging. However other types can also
deliver good performance provided that they, and the room, etc, all are
doing a decent job. Hence there may be more than one way to deal with this
problem. There are various reasons why 'beaming' is problematic in
practice, so it can have drawbacks that may mean another approach ends up
being preferred.

And in the end, of course, the source material has to provide the signals
that can then be used to create a decent image. If the recording/broadcast
is crap in this respect, then even excellent speakers can't give you a good
image. :-)

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

loudspeaker stereo imaging
 

Jim Lesurf wrote:

In article , Ian Bell
wrote:


It has a lot to do with the positions of the HF and LF drivers and your
listening position. These result in errors which can muddy the stereo
sound field. The only real solution is to use dual concentric speakers.

Interesting. I'd suspect most people wouldn't immediately think of the
Quad
ESL63's as 'dual concentric'. :-) More like 'multiple quasi-concentric'
or 'phased array', though. They image quite well, though.

In some senses this is not surprising since they have little LF response and
most positional information is in the higher frequencies.

Ian

loudspeaker stereo imaging
 

Jim Lesurf wrote:

In article , Ian Bell
wrote:


It has a lot to do with the positions of the HF and LF drivers and your
listening position. These result in errors which can muddy the stereo
sound field. The only real solution is to use dual concentric speakers.

Interesting. I'd suspect most people wouldn't immediately think of the
Quad
ESL63's as 'dual concentric'. :-) More like 'multiple quasi-concentric'
or 'phased array', though. They image quite well, though.

In some senses this is not surprising since they have little LF response and
most positional information is in the higher frequencies.

Ian

loudspeaker stereo imaging
 

On Wed, 12 Nov 2003 09:27:19 +0000
Ian Bell wrote:


It has a lot to do with the positions of the HF and LF drivers and
your listening position. These result in errors which can muddy the
stereo sound field. The only real solution is to use dual concentric
speakers.

I'd be highly sceptical of that.

Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.

Then walk around the room and be enlightened.

--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with
ketchup.

loudspeaker stereo imaging
 

On Wed, 12 Nov 2003 09:27:19 +0000
Ian Bell wrote:


It has a lot to do with the positions of the HF and LF drivers and
your listening position. These result in errors which can muddy the
stereo sound field. The only real solution is to use dual concentric
speakers.

I'd be highly sceptical of that.

Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.

Then walk around the room and be enlightened.

--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with
ketchup.

loudspeaker stereo imaging
 

On Thu, 13 Nov 2003 17:03:31 +0000, Ian Bell
wrote:

Jim Lesurf wrote:

In article , Ian Bell
wrote:


It has a lot to do with the positions of the HF and LF drivers and your
listening position. These result in errors which can muddy the stereo
sound field. The only real solution is to use dual concentric speakers.

Interesting. I'd suspect most people wouldn't immediately think of the
Quad
ESL63's as 'dual concentric'. :-) More like 'multiple quasi-concentric'
or 'phased array', though. They image quite well, though.

In some senses this is not surprising since they have little LF response and
most positional information is in the higher frequencies.

Contrary to popular mythology, Quads are in fact flat to below 40Hz,
it's just that the bass response is extremely clean, and they won't go
*loud*. Hence, they don't have the 'slam' of many box speakers.
--

Stewart Pinkerton | Music is Art - Audio is Engineering

loudspeaker stereo imaging
 

On Thu, 13 Nov 2003 17:03:31 +0000, Ian Bell
wrote:

Jim Lesurf wrote:

In article , Ian Bell
wrote:


It has a lot to do with the positions of the HF and LF drivers and your
listening position. These result in errors which can muddy the stereo
sound field. The only real solution is to use dual concentric speakers.

Interesting. I'd suspect most people wouldn't immediately think of the
Quad
ESL63's as 'dual concentric'. :-) More like 'multiple quasi-concentric'
or 'phased array', though. They image quite well, though.

In some senses this is not surprising since they have little LF response and
most positional information is in the higher frequencies.

Contrary to popular mythology, Quads are in fact flat to below 40Hz,
it's just that the bass response is extremely clean, and they won't go
*loud*. Hence, they don't have the 'slam' of many box speakers.
--

Stewart Pinkerton | Music is Art - Audio is Engineering

loudspeaker stereo imaging
 

"Ian Molton" wrote in message
...
On Wed, 12 Nov 2003 09:27:19 +0000
Ian Bell wrote:


It has a lot to do with the positions of the HF and LF drivers and
your listening position. These result in errors which can muddy the
stereo sound field. The only real solution is to use dual concentric
speakers.

I'd be highly sceptical of that.

Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.


Then walk around the room and be enlightened......

.....whilst you watch the smoke curl upwards gently from your tweeters :-)


Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with
ketchup.

loudspeaker stereo imaging
 

"Ian Molton" wrote in message
...
On Wed, 12 Nov 2003 09:27:19 +0000
Ian Bell wrote:


It has a lot to do with the positions of the HF and LF drivers and
your listening position. These result in errors which can muddy the
stereo sound field. The only real solution is to use dual concentric
speakers.

I'd be highly sceptical of that.

Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.


Then walk around the room and be enlightened......

.....whilst you watch the smoke curl upwards gently from your tweeters :-)


Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with
ketchup.

loudspeaker stereo imaging
 

"Ian Molton" wrote in message
...
On Wed, 12 Nov 2003 09:27:19 +0000
Ian Bell wrote:


It has a lot to do with the positions of the HF and LF drivers and
your listening position. These result in errors which can muddy the
stereo sound field. The only real solution is to use dual concentric
speakers.

I'd be highly sceptical of that.

Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.

Then walk around the room and be enlightened.

What a bloody horrible noise! Just tried it - what has it enlightened me to?

Rob

loudspeaker stereo imaging
 

"Ian Molton" wrote in message
...
On Wed, 12 Nov 2003 09:27:19 +0000
Ian Bell wrote:


It has a lot to do with the positions of the HF and LF drivers and
your listening position. These result in errors which can muddy the
stereo sound field. The only real solution is to use dual concentric
speakers.

I'd be highly sceptical of that.

Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.

Then walk around the room and be enlightened.

What a bloody horrible noise! Just tried it - what has it enlightened me to?

Rob

loudspeaker stereo imaging
 

Ian Molton wrote:

On Wed, 12 Nov 2003 09:27:19 +0000
Ian Bell wrote:


It has a lot to do with the positions of the HF and LF drivers and
your listening position. These result in errors which can muddy the
stereo sound field. The only real solution is to use dual concentric
speakers.

I'd be highly sceptical of that.

Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.

Then walk around the room and be enlightened.



That's because of room acoustics not the speakers. Given an acoustically
good room (a rarity indeed), what I said still stands.

Ian

loudspeaker stereo imaging
 

Ian Molton wrote:

On Wed, 12 Nov 2003 09:27:19 +0000
Ian Bell wrote:


It has a lot to do with the positions of the HF and LF drivers and
your listening position. These result in errors which can muddy the
stereo sound field. The only real solution is to use dual concentric
speakers.

I'd be highly sceptical of that.

Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.

Then walk around the room and be enlightened.



That's because of room acoustics not the speakers. Given an acoustically
good room (a rarity indeed), what I said still stands.

Ian

loudspeaker stereo imaging
 

Ian Molton wrote:

Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.

Then walk around the room and be enlightened.

I stuck a finger in my ear and was enlightened.

Just fired up the sound test CD and tried this (1, 5 and 10KHz). Also did it
with one ear covered, both walking around and rotating my head while
standing still. Node-tastic or wot? Some of the peaks and troughs are so
close together, that there must be frequencies that will have a peak at one
ear and a trough at the other. I dare say that, for a given position, there
would peaks at one frequency and troughs at another.

Makes me wonder if all that stereo imaging stuff is worth the bother (not
that I bother, especially).


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

loudspeaker stereo imaging
 

Ian Molton wrote:

Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.

Then walk around the room and be enlightened.

I stuck a finger in my ear and was enlightened.

Just fired up the sound test CD and tried this (1, 5 and 10KHz). Also did it
with one ear covered, both walking around and rotating my head while
standing still. Node-tastic or wot? Some of the peaks and troughs are so
close together, that there must be frequencies that will have a peak at one
ear and a trough at the other. I dare say that, for a given position, there
would peaks at one frequency and troughs at another.

Makes me wonder if all that stereo imaging stuff is worth the bother (not
that I bother, especially).


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

loudspeaker stereo imaging
 

Ian Bell wrote:

That's because of room acoustics not the speakers.

What effect does room acoustics have on the sound? Interaction between the
sound sources and reflections from the walls/furniture?


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

loudspeaker stereo imaging
 

Ian Bell wrote:

That's because of room acoustics not the speakers.

What effect does room acoustics have on the sound? Interaction between the
sound sources and reflections from the walls/furniture?


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

loudspeaker stereo imaging
 

"Mike Gilmour" wrote
Someone else wrote:
Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.


Then walk around the room and be enlightened......

....whilst you watch the smoke curl upwards gently from your tweeters :-)

Why would that necessarily happen?


Martin
--
M.A.Poyser Tel.: 07967 110890
Manchester, U.K. http://www.fleetie.demon.co.uk

loudspeaker stereo imaging
 

"Mike Gilmour" wrote
Someone else wrote:
Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.


Then walk around the room and be enlightened......

....whilst you watch the smoke curl upwards gently from your tweeters :-)

Why would that necessarily happen?


Martin
--
M.A.Poyser Tel.: 07967 110890
Manchester, U.K. http://www.fleetie.demon.co.uk

loudspeaker stereo imaging
 

"Fleetie" wrote in message
...
"Mike Gilmour" wrote
Someone else wrote:
Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.


Then walk around the room and be enlightened......

....whilst you watch the smoke curl upwards gently from your tweeters
:-)

Why would that necessarily happen?


Quite a few audiophiles are over 50. Consider you've lost some or all of
the ability to hear 10 kHz either due to age or premature hearing loss,(when
did you last take a recognised hearing test??) So what do you do? You turn
the gain up high..the tweeters are happily pumping out high levels of HF
with the 'listener' oblivious of the level.

Mike



Martin
--
M.A.Poyser Tel.: 07967
110890
Manchester, U.K.
http://www.fleetie.demon.co.uk

loudspeaker stereo imaging
 

"Fleetie" wrote in message
...
"Mike Gilmour" wrote
Someone else wrote:
Put *any* set of speakers in your room, and play a (say) 8-10kHz sine
wave out of both speakers.


Then walk around the room and be enlightened......

....whilst you watch the smoke curl upwards gently from your tweeters
:-)

Why would that necessarily happen?


Quite a few audiophiles are over 50. Consider you've lost some or all of
the ability to hear 10 kHz either due to age or premature hearing loss,(when
did you last take a recognised hearing test??) So what do you do? You turn
the gain up high..the tweeters are happily pumping out high levels of HF
with the 'listener' oblivious of the level.

Mike



Martin
--
M.A.Poyser Tel.: 07967
110890
Manchester, U.K.
http://www.fleetie.demon.co.uk

loudspeaker stereo imaging
 

Wally wrote:

Ian Bell wrote:

That's because of room acoustics not the speakers.

What effect does room acoustics have on the sound? Interaction between the
sound sources and reflections from the walls/furniture?


Yes.

Ian