Newsletter
Lateral Sound Reflections II
Continued Education…
This week we continue with an electronic rendition of a page from the notebook of ASC Founder and TubeTrap inventor Art Noxon, Acoustical PE. Art expands upon the discussion of early lateral sound reflections. Enjoy!
Crosstalk
In addition to side wall reflections, where the sound from the speaker is reflected off the wall to the outside of the speaker, we also have reflections off the opposite wall.
In this case, we have left speaker information being reflected into the right ear.
As before, we have 3 wall reflections; side walls, upper ceiling corner, and lower floor corner.
Additionally, we have triple reflections where the front two corners become involved. Here are shown some of these triple reflections. They follow similar paths as before, except they include a reflection off the front wall (or ceiling).
Because the paths are longer, the reflections are weaker and more time delayed, but still within the sound fusion time window.
There are two aspects to all these early lateral reflections that need to be understood:
1) What is wrong with this
2) How to get rid of them
What is left out of these diagrams is the horizontal wall bounce paths and the floor bounce paths.
Audiophiles tend to prefer ambient listening rooms which means to control early reflections with minimal amount of sound deadening panels in the room.
Notice each set of reflecting paths cross one another. Add a TubeTrap (floor to ceiling stack) at each path intersection.
In addition to TubeTraps, consider installing SoundPlanks to control the image-destroying crosstalk reflections in your listening room without overdamping. You’ll be surprised how effectively they can absorb nearly all of the reflections discussed here.
