Interpretare soft

[SIG]

Buna.Am rugamintea daca ma poate lamuri cineva referitor la modul cum trebuie interpretat rezultatele obtinute de la softurile ptr.calcul incinte.
Adica graficul de phase plot nu-l inteleg ce vrea sa arate si cel de group delay,de fapt ce inseamna. Si cam care ar fi formele ideale ale lor,sau cam cum trebuie sa arate ptr.un rezultat bun.Multumesc.

[Mitica]

[Vasile]

Softurile alea doar sugereaza, daca vrei discutii shit vezi forumul meu

[SIG]

Bun,bun,dar ce inseamna in cazul incintelor phase plot si ce inseamna group delay,luind strict cuvintele respective,poate ca forma lor grafica se poate dezbate dar eu nici macar nu stiu ce inseamna.

[Vasile]

Nu ai vrea ca programul sa si construiasca incinta ?
Exista mii de articole pe internet care explica acesti termeni

[SIG]

Cred ca-ti place mult sa o ti pe a ta.Am pus o intrebare care nu costa mai mult de 3 pana la 10 cuvinte,adica "phase plot inseamna ... si group delay inseamna... "(Nu ma supar-nu te superi)

[Vasile]

Termenii astia trebuie sa-i intelegi nu sa-ti spun eu in 2 cuvinte ce inseamna, daca vrei asa tradu-i pur si simplu

[SIG]

Daca nu sti sa vorbesti folositor mai bine ia o pauza

[Vasile]

Ce ma enerveaza la unii (ca tine) ca sunt foarte lenesi si in loc caute mai bine intreaba pentru ca-i mai simplu.

Asta vrei, nu vrei le si traduc ?

Group Delay
This graph is similar to the phase response graph except that it expresses the lag of the output audio signal as a delay in milliseconds. The group delay is derived from the slope of the phase response.
Ideally, there should be no delay from one frequency to the next. This would result in a flat plot line. In general, the group delay increases as the frequency decreases. A gradual change in the group delay is not very audible. However, sudden large changes in group delay are audible and should be avoided.

Phase Response
This graph shows how much the audio signal emanating from the driver will lag behind the input signal. This delay is expressed as a phase angle in degrees. It is literally the difference between the phase of the input signal and the phase of the output signal.
The phase of a perfect sine wave rotates 360° in one complete cycle or wavelength. If this perfect sine wave were used to drive the loudspeaker and the sound that emanated from it had no delay, the phase response would be zero degrees (0°) because the phase of both the input and output would match perfectly. If the sine wave emanating from the loudspeaker were delayed by half a wavelength, the phase response would be 180° at that frequency. In this case, the sine wave emanating from the loudspeaker would be inverted—it would be negative when the input is positive and visa versa.
The phase response is most important in the crossover region between two different drivers. If the phase response at the crossover frequency of the woofer is 180° different from that of the tweeter, then the sound emanating from the two drivers will cancel at the crossover frequency, creating a dip in the amplitude response.
Ideally, there should be no difference in phase from one frequency to the next. This would result in a flat plot line. In practice however, the phase angle increases as the frequency decreases. Closed boxes typically experience a 180° total phase shift while vented boxes typically experience a 360° total phase shift. Bandpass boxes have an even greater phase shift.
Gradual phase shift is not very audible. However, sudden large shifts in phase are audible and should be avoided.

Copyright 1992-98 by Harris Technologies, Inc.