Phase Graph

How to read acoustic phase in degrees and use it alongside group delay and crossover work.

Direct answer

The phase graph shows predicted acoustic phase in degrees across frequency.

What it measures

• Phase angle in degrees, displayed over a fixed -180 to 180 degree range by default.
• Phase rotation from enclosure behavior, filters, and low-frequency rolloff.
• Relative phase differences between visible designs.

Why it matters

• Phase affects summing with other sources and crossover integration.
• It explains why group delay changes around resonances and filter corners.
• It helps spot alignments that may need more careful integration.

How to read it in 00 Simulator

• Read phase as contextual support for SPL and group delay, not as a standalone pass/fail metric.
• Compare phase around crossover or overlap frequencies when integrating systems.
• Use consistent filter, polarity, and distance assumptions when comparing designs.

What good, warning, and bad usually look like

Good

Phase behavior is predictable and consistent with the intended enclosure and filters.

Warning

Phase changes rapidly near the region where another source must sum with it.

Bad

The phase behavior makes the intended acoustic summing impossible without additional alignment work.

Common false conclusions

• A phase wrap is not automatically a defect.
• Phase at one frequency does not describe the whole integration problem.
• Phase should not be separated from magnitude response and physical placement.

App behavior notes

• The UI graph id is `phase`; the internal graph key is also `phase`.
• The graph defaults to a manual -180 to 180 degree scale.