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Improving loudspeaker crossovers (SBL's)



 
 
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  #1 (permalink)  
Old December 22nd 07, 10:43 PM posted to uk.rec.audio
Serge Auckland
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Posts: 509
Default Improving loudspeaker crossovers (SBL's)

"Eeyore" wrote in message
...


Serge Auckland wrote:

What you're trying to achieve is a short reverberation time which means
plenty
of
soft furnishings, carpeted floor and so on.


Well it's a combination of reducing the reverberant field's *intensity* as
well
as the reverberation time.

You don't want to 'overdamp' a room though, it won't sound natural. The
ear
adaps naturally to dealing with a modest reverberant field.

Graham

Indeed. Too short a RT and the room sounds dead. However, in my view what
you don't absorb should be diffused, so I mix a certain amount of absorbtion
with diffusion. In a domestic setting, a bookcase with different size books,
and with several gaps which could have small ornaments (standing on felt so
they don't rattle) makes an acceptable diffuser. A slatted ceiling can be
very effective as both a diffuser and absorber, and look attractive if well
done.

S.


--
http://audiopages.googlepages.com


  #2 (permalink)  
Old December 23rd 07, 02:08 AM posted to uk.rec.audio
Eeyore
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Posts: 1,415
Default Improving loudspeaker crossovers (SBL's)



Serge Auckland wrote:

"Eeyore" wrote
Serge Auckland wrote:

What you're trying to achieve is a short reverberation time which means
plenty of soft furnishings, carpeted floor and so on.


Well it's a combination of reducing the reverberant field's *intensity* as
well as the reverberation time.

You don't want to 'overdamp' a room though, it won't sound natural. The
ear adaps naturally to dealing with a modest reverberant field.


Indeed. Too short a RT and the room sounds dead. However, in my view what
you don't absorb should be diffused, so I mix a certain amount of absorbtion
with diffusion. In a domestic setting, a bookcase with different size books,
and with several gaps which could have small ornaments (standing on felt so
they don't rattle) makes an acceptable diffuser. A slatted ceiling can be
very effective as both a diffuser and absorber, and look attractive if well
done.


Sounds good to me.

Graham

  #3 (permalink)  
Old December 24th 07, 08:31 AM posted to uk.rec.audio
Jim Lesurf
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Posts: 3,051
Default Improving loudspeaker crossovers (SBL's)

In article , Serge Auckland
wrote:
"Eeyore" wrote in message
...



You don't want to 'overdamp' a room though, it won't sound natural.
The ear adaps naturally to dealing with a modest reverberant field.



Indeed. Too short a RT and the room sounds dead.


Depends on the nature of the sound source, and what you want to hear. For
good recordings of classical or 'acoustic' music I prefer to hear the
recorded acoustic of the location where the recording/performance was made.
So a room that sounds 'dead' when you are speaking, etc, may be fine.

Slainte,

Jim

--
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  #4 (permalink)  
Old December 24th 07, 12:22 PM posted to uk.rec.audio
Serge Auckland
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Posts: 509
Default Improving loudspeaker crossovers (SBL's)

"Jim Lesurf" wrote in message
...
In article , Serge Auckland
wrote:
"Eeyore" wrote in message
...



You don't want to 'overdamp' a room though, it won't sound natural.
The ear adaps naturally to dealing with a modest reverberant field.



Indeed. Too short a RT and the room sounds dead.


Depends on the nature of the sound source, and what you want to hear. For
good recordings of classical or 'acoustic' music I prefer to hear the
recorded acoustic of the location where the recording/performance was
made.
So a room that sounds 'dead' when you are speaking, etc, may be fine.

Slainte,

Jim


This may be a personal thing, but I find a room that's too dead somewhat
oppressive. The few times I've worked in an anechoic chamber, I didn't find
it pleasant. I get much the same feeling if I'm wearing earplugs or good ear
defenders, I'm too concious of my own internal body noises, breathing and
the like.

Of course, the phrase "too dead" is a subjective one, and I agree with toy
in that I prefer to listen to music in a room that tends toward the "dead"
rather than "live". I've never got on terribly well with the LEDE concept
(Live End Dead End) for listening rooms, I've always preferred a room that
tends towards "dead" but one can still carry on normal conversation, and has
a "normal" feel. What that means in actual RT and the frequency distribution
of that RT I don't know, as I haven't measured many rooms. The IEC standard
listening rooms I've been in have sounded "right", as have the radio studios
built to the old IBA Code of Practice.

S.


--
http://audiopages.googlepages.com



  #5 (permalink)  
Old December 24th 07, 12:29 PM posted to uk.rec.audio
tony sayer
external usenet poster
 
Posts: 2,042
Default Improving loudspeaker crossovers (SBL's)

Of course, the phrase "too dead" is a subjective one, and I agree with toy
in that I prefer to listen to music in a room that tends toward the "dead"
rather than "live". I've never got on terribly well with the LEDE concept
(Live End Dead End) for listening rooms, I've always preferred a room that
tends towards "dead" but one can still carry on normal conversation, and has
a "normal" feel. What that means in actual RT and the frequency distribution
of that RT I don't know, as I haven't measured many rooms. The IEC standard
listening rooms I've been in have sounded "right", as have the radio studios
built to the old




IBA Code of Practice.


Is that online anywhere?...

--
Tony Sayer

  #6 (permalink)  
Old December 24th 07, 12:43 PM posted to uk.rec.audio
Serge Auckland
external usenet poster
 
Posts: 509
Default Improving loudspeaker crossovers (SBL's)

"tony sayer" wrote in message
...
Of course, the phrase "too dead" is a subjective one, and I agree with
toy
in that I prefer to listen to music in a room that tends toward the "dead"
rather than "live". I've never got on terribly well with the LEDE concept
(Live End Dead End) for listening rooms, I've always preferred a room
that
tends towards "dead" but one can still carry on normal conversation, and
has
a "normal" feel. What that means in actual RT and the frequency
distribution
of that RT I don't know, as I haven't measured many rooms. The IEC
standard
listening rooms I've been in have sounded "right", as have the radio
studios
built to the old




IBA Code of Practice.


Is that online anywhere?...

--
Tony Sayer


Not that I know of. I have a partial set of the IBA Technical Review
booklets. Book 2 has the CoP for TV and ILR studios.

If anyone's interested, I can scan the relevant Radio Studio pages and post
them

S.


--
http://audiopages.googlepages.com


  #7 (permalink)  
Old December 26th 07, 10:58 AM posted to uk.rec.audio
tony sayer
external usenet poster
 
Posts: 2,042
Default Improving loudspeaker crossovers (SBL's)

In article , Serge Auckland
scribeth thus
"tony sayer" wrote in message
...
Of course, the phrase "too dead" is a subjective one, and I agree with
toy
in that I prefer to listen to music in a room that tends toward the "dead"
rather than "live". I've never got on terribly well with the LEDE concept
(Live End Dead End) for listening rooms, I've always preferred a room
that
tends towards "dead" but one can still carry on normal conversation, and
has
a "normal" feel. What that means in actual RT and the frequency
distribution
of that RT I don't know, as I haven't measured many rooms. The IEC
standard
listening rooms I've been in have sounded "right", as have the radio
studios
built to the old




IBA Code of Practice.


Is that online anywhere?...

--
Tony Sayer


Not that I know of. I have a partial set of the IBA Technical Review
booklets. Book 2 has the CoP for TV and ILR studios.

If anyone's interested, I can scan the relevant Radio Studio pages and post
them


Be interesting .. but only when U have the time to do it!....
S.



--
Tony Sayer


 




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