Reference

Reference · Tiles

TILEHORNSDB

Horn Radiating Outputs

A horn can radiate from more than one place. This tile splits those contributions so you can see whether they support or cancel one another.
Shows
Each radiating mouth, port or exposed cone separately, plus their coherent total.
Healthy when
The outputs combine usefully over the intended band, without an unwanted cancellation notch.
If it is not
Compare their levels and phases, then test the path lengths or driver positions that set their relationship.

The tile#

Back-loaded horn: direct cone and mouthHorn Radiating Outputs · dB
  • Total
  • Main mouth
  • Direct radiator
The outputs are pressures, so they add with their phase: where the dashed lines are close in level and opposite in phase, the total drops below both.

This is the back-loaded-horn guide’s design: B&C 10PS26, Half Space · 1.0 m · 50 W. Dashed curves show Main mouth and Direct radiator. The solid curve is their coherent total.

Magnitude shows SPL from each radiating output. Phase shows their far-field pressure phases and the phase of the summed pressure. There is no station selector because these are the outlets to the room, rather than internal locations.

Read a cancellation#

  1. 1

    Find the notch

    Look for a total below strong individual outputs at the same frequency.
  2. 2

    Compare phase

    Switch to Phase. Outputs with similar levels and opposing phases can nearly cancel. Their decibel readings must not be added as ordinary numbers.
  3. 3

    Change the cause

    Preview the path length, driver entry or other geometry that sets their relationship, then recheck the complete useful band. Moving one notch may create another.
Horn connectionWhat to look for
Back-loaded hornThe exposed front cone combining with the rear-loaded horn mouth.
Compound hornThe front and rear horn mouths combining.
A ported rear chamberThe port contribution combining with the other radiating output.
A single-mouth hornA single outlet can leave little to separate; use internal diagnostics for path behaviour.

Keep the model’s limits in view#

These outputs are the model’s coherent far-field pressures at its configured distance and radiation conditions. The tile is not a room-interference or directivity prediction. It also omits the dashed folded-horn comparison shown on ordinary frequency graphs.

What to try#

TryWhat it changes
Find cancellationLook for the solid total falling below strong individual dashed outputs.
Check phaseSwitch to Phase at a suspected notch; the outputs combine as pressures, not as dB values.
Trace each outputUse Schematic to see where each radiating contribution comes from.

Ask your AI#

Ask your AI

Using 00 Simulator, inspect the radiating outputs of my horn and find any cancellation inside its intended working band. Compare each output’s level and phase at the notch, then preview a geometry change and report whether the total response improves.
or open it inClaudeChatGPT

Connect your assistant so it can open your designs.

DiagnosticsBack-loadedCompoundSchematic