34
DSX
You also have the option of
Temperature
change, through which you can introduce the temperature (in
Celsius or Fahrenheit) making the calculation of the speed of sound as accurate as possible. The calculation
of the speed of sound
(Vs)
depending on the temperature is obtained with the following formula:
Vs
= 20.06 x
(273+ºC)
being ºC the temperature in Celsius degrees. In this formula, and taking an average temperature of 20 ºC (68
degrees F) the following useful relationships are obtained:
Delay in miliseconds = distance in meters x 2,192
Delay in miliseconds = distance in feet x 0,955
Distance in meters = Delay in miliseconds x 0,456
Distance in feet = Delay in milieseconds x 1.047
4 - EDITING WITH DSX
In each output we have a delay of 28.81 miliseconds (7.20 meters to 25 ºC). You can use these delays
for:
- Correct the vertical position of the boxes on a multi-way system that is not in the same vertical plane,
or that part of the boxes (for example, HIGH-MIDs) are flown, and the rest (LOWs) on the floor, having different
distances to the listener.
In any case you will have the correct path difference calculated, and add the corresponding delays in each of
the ways in order to make them arrive at the same time to the audience.
- Make fine adjustments between transducers inside a cabinet.
Normally the physical placement of each transducer in one box does not match exactly in its vertical
plane (for example a 12-inch speaker and a 2-inch driver), and also the order of filters used and the phase
response of each transducer rarely coincide. In this case you can correct this effect with an accuracy of 0.7
centimeter, to obtain a completely in phase output and have a coherent wave front.
Av.1
Av.2
t
2
= 10ms
t
1
= 12ms
t
1
-t
2
= 2ms
t
2
t
1
Summary of Contents for DSX-1004
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