FOCAL MANAGER DSA 500 RT EXPERT PERFORMANCE
U s e r m a n u a l
18
86()8/<RXFDQ
drag
WKHOHIWRUULJKWVSHDNHUGLUHFWO\ZLWKLQLWVHQWU\]RQHLQRUGHUWRPRYHLW
EDFNZDUGVLQVSDFH
(fig. 28)
(fig. 28)
An example of how this is applied in pratice is given below:
,1'(7$,/
The precedence effect is a recognised acoustic phenomenon that induces the brain into thinking that the only
source of a sound is the source from which the sound waves reach the ears firstly. It is also known as the Haas effect.
If no delay is applied within a vehicle, the driver is physically closer to the speakers situated on his side, whose sound
waves reach him before the sound waves from the speakers on the passenger side. He therefore naturally perceives a
"projected" soundstage from his side of the vehicle.
By delaying the signal sent to the closest speakers, the listener can distance himself virtually from the sound source, and
thus occupies a virtual position an equal distance from both the right-hand and left-hand speakers. The result perceived
is a soundstage re-centered in front of the windscreen, and therefore more well-defined from a spectrum point of view.
In the illustration below
(fig. 29)
, the left channel is delayed by 1.5 ms, so the virtual soundstage moves to the right. For
the listener in the left-hand seat, the effect perceived is a soundstage that moves to the center of the dashboard. 1.5 ms
is often enough to obtain the desired effect in smaller vehicles.
