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POSITIONING YOUR TORUS INFRASONIC GENERATOR
Should you find that you are experiencing high outputs at particular frequencies there are steps
that can be taken to reduce these. A frequency sweep can be used to explore the room’s
response. In conjunction with a sound meter a measured response can be more accurate but
this should always be compared with listening tests. There are two modes in any one
rectangular room relating directly to the dimensions of the length and width of the room. These
will define the frequency at which the room will be excited. At this point the sound pressure
levels will be highest. However, this is also dependent upon the listening position within the field
and if you move around you will find the levels will change in a predictable way. You will quickly
find that there are also two null points that will be half way between the length of each of the
room’s dimensions. It is this kind of process that enables you to understand the unique
characteristics of your listening room.
A useful technique when looking for the optimum location is to place the Generator at the most
common seating position. By working methodically through a range of frequencies, record the
measurements around the perimeter of the room where the Torus might be located to ascertain
the loudest signal. This process will assist in building up a picture of where the room is
augmenting the output or not. One way of using this information would be to determine three
possible options, the loudest, least loudest and a middle position. This will provide a much
clearer idea of adjusting the generators location over a period of time with listening tests with
music.
Today, there are many sources available on the internet, where you can download frequency
sweep tracks, which can be burnt to a disc or recorded onto your computer and played through
your system. There are Applications for mobile phones available for download to help with this
process also. Please be careful when working with any of these measurement procedures.
Always begin the test with the amplifier in the lowest level of output then increase slowly.
Always progress through the tests with caution and double check volume levels as good
practice. It is very easy to damage the system if care is not exercised at all times.
figure 5.
Listening
Position
Torus
Channel
Channel
Line running through center of
coils of Torus & loudspeakers
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