Localization Spaciousness Reverberation: Difference between revisions
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{{Editorial|Author=[[User:Hilmar-at-Bose|Hilmar-at-Bose]]}} | |||
Originally posted by Hilmar-at-Bose | Originally posted by Hilmar-at-Bose | ||
<ref>[http://bose.infopop.cc/eve/forums/a/tpc/f/6806048934/m/4891042361/r/2051026361#2051026361 Hilmar-at-Bose in the Bose® Musicians Community Message Boards]</ref> | <ref name="hilmar">[http://bose.infopop.cc/eve/forums/a/tpc/f/6806048934/m/4891042361/r/2051026361#2051026361 Hilmar-at-Bose in the Bose® Musicians Community Message Boards]</ref> | ||
There may be some confusion about “localization” and “spaciousness”. Both are perceptual attributes, which have been intensively studied especially in the context of concert hall acoustics. | There may be some confusion about “localization” and “spaciousness”. Both are perceptual attributes, which have been intensively studied especially in the context of concert hall acoustics. | ||
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The main contributing factors for spaciousness are “early lateral reflections”. These are reflections from the sidewalls. Reflections from the side help quite a bit with creating a sense of space and envelopment. Reflection from the floor and ceiling are less desirable since they don’t enhance spaciousness but can negatively impact clarity and spectral balance. There are very interesting physiological reasons of why lateral reflections are perceived so much differently than vertical ones. I could drone on for hours on this topic, but I’ll save that for later. Anyway, it’s not too much of a surprise that most renowned concert halls (e.g. Musikvereinssaal in Vienna, Concertgebow in Amsterdam, or Boston Symphony Hall) have a “shoebox” shape that is long, narrow and tall. This shape provides good lateral reflections pretty much everywhere in the audience. Ironically, it’s not very popular with architects since the sight lines are terrible. Visually oriented architects prefer the “shell” shape, which provides great viewing but (unfortunately) no lateral reflections whatsoever. But I’m digressing again… The L1 does (in my humble opinion) the best thing. It radiates very wide horizontally but very little much towards the ceiling. Thus it provides enough energy for lateral reflections but keeps interfering ceiling reflections at bay. Since it’s a single source, it provides very easy and accurate localization, but in most venues the image will also be pleasantly spacious. That’s at least my own experience. - read it in context - | The main contributing factors for spaciousness are “early lateral reflections”. These are reflections from the sidewalls. Reflections from the side help quite a bit with creating a sense of space and envelopment. Reflection from the floor and ceiling are less desirable since they don’t enhance spaciousness but can negatively impact clarity and spectral balance. There are very interesting physiological reasons of why lateral reflections are perceived so much differently than vertical ones. I could drone on for hours on this topic, but I’ll save that for later. Anyway, it’s not too much of a surprise that most renowned concert halls (e.g. Musikvereinssaal in Vienna, Concertgebow in Amsterdam, or Boston Symphony Hall) have a “shoebox” shape that is long, narrow and tall. This shape provides good lateral reflections pretty much everywhere in the audience. Ironically, it’s not very popular with architects since the sight lines are terrible. Visually oriented architects prefer the “shell” shape, which provides great viewing but (unfortunately) no lateral reflections whatsoever. But I’m digressing again… The L1 does (in my humble opinion) the best thing. It radiates very wide horizontally but very little much towards the ceiling. Thus it provides enough energy for lateral reflections but keeps interfering ceiling reflections at bay. Since it’s a single source, it provides very easy and accurate localization, but in most venues the image will also be pleasantly spacious. That’s at least my own experience. - read it in context<ref name="hilmar">[http://bose.infopop.cc/eve/forums/a/tpc/f/6806048934/m/4891042361/r/2051026361#2051026361 Hilmar-at-Bose in the Bose® Musicians Community Message Boards]</ref> | ||
Originally posted by Ken-at-Bose <ref>[http://bose.infopop.cc/eve/forums/a/tpc/f/6806048934/m/4891042361/r/9411055461#9411055461 Ken-at-Bose in the Bose® Musicians Community Message Boards]</ref> (later in the same discussion): | Originally posted by Ken-at-Bose <ref>[http://bose.infopop.cc/eve/forums/a/tpc/f/6806048934/m/4891042361/r/9411055461#9411055461 Ken-at-Bose in the Bose® Musicians Community Message Boards]</ref> (later in the same discussion): | ||
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High reverberance is caused by lots of reflections in rooms with little absorption. The L1 is particularly good at NOT producing as much reverberance because it sends little sound to the upper walls and ceiling where many detrimental reflections originate and are perpetuated. | High reverberance is caused by lots of reflections in rooms with little absorption. The L1 is particularly good at NOT producing as much reverberance because it sends little sound to the upper walls and ceiling where many detrimental reflections originate and are perpetuated. | ||
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