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short MIR-Preview-video
Last post Thu, Nov 20 2008 by Ben Johnson, 6 replies.
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Posted on Sun, Nov 16 2008 23:46
by Sergino Futurino
Joined on Thu, Dec 18 2003, Italy, Posts 652

I did have a look at the "short MIR-Preview-video".

It looks like all the samples are based on empty halls.

For what I know many halls sound too reverbereting if there are no adience and musicians inside.

For example, some  high frequency tones could be lowened by the musicians bodies.

How can you recreate all these absorptions in asample of an empty room?

Sergino

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Posted on Mon, Nov 17 2008 11:39
by steff3
Joined on Thu, Nov 13 2003, Posts 268
That is an interesting aspect. However I think it is pretty much impossible to make IRs with human beings in the space. But interesting nevertheless ....

best
Posted on Mon, Nov 17 2008 14:02
by fcw
Joined on Wed, May 11 2005, UK, Posts 153

This certainly won't apply to spaces that pre-date modern acoustics (for example, cathedrals), but I believe it's been standard practice for a while now to fit concert halls with seating that has similar sound-absorbing characteristics to a human body, such that the size or distribution of the audience shouldn't noticeably affect the sound of the hall. 

It would be interesting to find out which halls that have been sampled actually have this property, though.

steff3 wrote:
However I think it is pretty much impossible to make IRs with human beings in the space.

I don't see why, other than the logistical complications of getting a load of people to sit there quietly during the sampling process (although removing any squeals they make when bangs go off could be amusing).

Posted on Mon, Nov 17 2008 15:04
by herb
Joined on Mon, Aug 05 2002, Posts 4622

The sampling session for all MIR impulses takes up to 16 hours only for one hall.

Don't forget there have to be hundreds of impulses recorded.

The noise of the impuls generator is hurting  your ears extremely.

And at least the all seats of the Konzerthaus are prepared to "simulate" people sitting there.

best

Herb

Posted on Mon, Nov 17 2008 16:27
by michael_12374
Joined on Wed, Feb 09 2005, Posts 26

 That could give a nice picture: a room full of mannequins Smile

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Posted on Thu, Nov 20 2008 03:12
by Ben Johnson
Joined on Tue, Dec 23 2003, Chicago, Illinois, Posts 126
herb wrote:

And at least the all seats of the Konzerthaus are prepared to "simulate" people sitting there.

 

Indeed. Many auditoriums have seat cushions that are designed to have the same acoustical absorption properties as the human that would otherwise occupy the empty seat.

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