Cumulative localization

from Wikipedia, the free encyclopedia

The cumulative localization is a specific form of localization of auditory events that is fundamental for stereophonic stereo loudspeaker reproduction. This makes the illusion of spatial sound reproduction (as opposed to mono ) possible.

If a stereo recording is played over two loudspeakers that are about ear height in front of the listener, a sound field is superimposed in the room that creates a stereo sound impression on the center line between the loudspeakers. The listener should ideally be in this sweet spot in the middle in front of the stereo loudspeakers.

The summing localization effect is the example of a speaker beschallung explained. If two loudspeakers L1 and 2 emit exactly the same sound signal synchronously and in the correct phase (i.e. with the same frequency composition and the same sound level ), then a listener located on the center perpendicular of the loudspeaker base does not locate two separate signals at L1 and L2, but only a composite signal in the middle of the Base width , namely a fictitious transmitter, called a phantom sound source .

If one continuously increases the sound level of L1 compared to L2, the phantom sound source moves along the loudspeaker base in order to coincide completely with L1 at a level difference greater than ∆ L = 18 dB (16 dB to 20 dB), i.e. This means that the localization impression is created entirely to the side, i.e. 100% direction of the auditory event , from the direction of one of the two loudspeakers. On the other hand, radiates z. If, for example, L1 is not synchronized with L2, but earlier, the audible impression is that only the loudspeaker L1 is emitting even with the small time difference greater than ∆ t = 1.5 ms (1 ms to 2 ms).

The loudspeaker signals are made up of interchannel level differences and transit time differences .

See also


Web links