Waveguide research monitor

Purifi-Like ND28F-6

Live observability for the waveguide research workspace. This view stays focused on study direction, score movement, and the currently selected candidate.

Project Study

Second long study with larger exploration ranges for each parameter

Coordinator

Live research control

One shared coordinator keeps the study moving, fills open lanes, and can switch between multi-objective tradeoff exploration, scalar global search, local refinement, and LLM-guided proposals.

Proposal mode

NSGA-II

Multi-objective population search across beamwidth, flatness, collapse, non-linearity, monotonicity, and roughness.

Use it when you want tradeoff coverage or the target weights are still moving.

DE Active guide

Differential evolution minimizes the current scalar score with a broad, robust population search.

Use it when the weighted score is trusted and you want global numeric search.

CMA-ES

Covariance-adapting continuous search that is strongest once a promising region is already known.

Use it when you already have a good family and want local refinement.

LLM

Codex proposes geometry changes from recent history, failure patterns, and qualitative directivity behavior.

Use it when you want hypothesis jumps or strategy changes instead of pure numeric tuning.

Bestcandidate-0289 • 74.33

Latestcandidate-0296 • 78.47

Runs296

Kept12

Inflight8

Active lanes8

Active study Purifi-Like ND28F-6 / nd28f_6_purifi_like_baseline

The selected study is active now.

288 success 8 failure Queue 0 Updated 3/17/2026, 7:44:11 AM

Iteration metrics

Study-wide score movement and the component metrics that define the active objective.

Selected study: Wider exporation range

Score over iteration

Optimize: lower. Weights BW RMS 1.35, flatness 0.80, HF collapse 0.50, non-linearity 1.10, monotonicity 0.30, roughness 0.10.

Score

Beamwidth RMS error

Optimize: lower. Target 140° from 3 kHz-20 kHz. Weight 1.35.

BW RMS

Contour flatness

Optimize: lower. Target equal loudness at 10°, 20°, 30°, 40°, 50°, 60° across 3 kHz-20 kHz. Weight 0.80.

Flatness

High-frequency collapse

Optimize: lower. Target 0° loss from 3 kHz-6 kHz to 10 kHz-20 kHz. Weight 0.50.

HF Collapse

Beamwidth non-linearity

Optimize: lower. Target 0° hourglass or bowed deviation across 3 kHz-20 kHz. Weight 1.10.

Non-Linearity

Angular monotonicity penalty

Optimize: lower. Target 0 dB off-axis re-growth as angle increases across 3 kHz-20 kHz. Weight 0.30.

Monotonicity

Beamwidth roughness

Optimize: lower. Target 0° step-to-step wiggle across 3 kHz-20 kHz. Weight 0.10.

Roughness

Candidate detail

Focused on candidate-0289

Iteration 289 • Score 74.33

3D geometry

Show directivity

Frequency 1 kHz

Drag to rotate. Scroll or use +/- to zoom. Brown marks the waveguide and teal marks the source contour. Enable directivity to overlay the far-field radiation shell.

Directivity

Active frequency slice 1k

0 dB-6 dB-12 dB-18 dB-24 dB

Normalized directivity map. The vertical axis is angle in degrees, the horizontal axis is frequency, and the color scale is level relative to on-axis.

Beamwidth vs frequency

Evaluation trace used by the scorer

Beamwidth

Edge drop vs frequency

At ±70.0 deg

Edge Drop

Scored metrics

Score: 74.33
Mean beamwidth: 106.34 deg
BW RMS error: 36.70 deg
Contour flatness: 2.18 dB
HF collapse: 27.72 deg
Non-linearity: 8.11 deg
Monotonicity penalty: 0.70 dB
Roughness: 0.42 deg
Mean edge drop: 15.15 dB

Candidate parameters

{
  "abec": {
    "abscissa": 1,
    "distance_m": 2,
    "f1_hz": 1000,
    "f2_hz": 20000,
    "mesh_frequency_hz": 40000,
    "norm_angle_deg": 0,
    "num_frequencies": 100,
    "offset_mm": null,
    "polar_angle_max_deg": 90,
    "polar_angle_min_deg": 0,
    "polar_points": 73,
    "sim_profile": 0,
    "sim_type": 1
  },
  "candidate_id": "candidate-0289",
  "driver": {
    "dome_diameter_mm": 28.575,
    "dome_height_mm": 4.68,
    "manufacturer": "Dayton Audio",
    "model": "ND28F-6",
    "mount_recess_mm": 2,
    "name": "Dayton Audio ND28F-6",
    "surround_enabled": true,
    "surround_height_mm": 1.8,
    "surround_width_mm": 3.5
  },
  "project_name": "nd28f_6_purifi_like_baseline",
  "scoring_config": "configs/scoring.purifi_baseline_v2.json",
  "study_name": "nd28f_6_purifi_like_baseline",
  "throat": {
    "diameter_mm": 35.575,
    "extension_angle_deg": 30.30007581959204,
    "extension_length_mm": 0,
    "opening_angle_deg": 37
  },
  "waveguide": {
    "coverage_deg": 100,
    "length_mm": 197,
    "mesh_length_segments": 71,
    "os_k": 0.2596327933856354,
    "slot_length_mm": 0,
    "term_n": 5,
    "term_q": 0.9980793393925476,
    "term_s": 0.6166107895126373
  }
}