# 📐  L2 Spec — Clinical B-mode Ultrasound Mismatch-Only Spec

**ID:** `L2-032-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-032`](/artifact/l1/L1-032)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41553388

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| F mhz | MHz | 1 – 30 |
| Snr db | dB | 0.0 – 40.0 |
| N lines | — | 64 – 1024 |
| Depth cm | — | 1 – 30 |
| Shadowing | — | 0.0 – 0.5 |
| N elements | — | 32 – 512 |
| Reverberation | — | 0.0 – 0.3 |
| Probe pressure | — | 0.0 – 0.3 |
| Acoustic attenuation | — | 0.1 – 1.5 |
| Speed of sound error | — | 0.0 – 0.05 |

## 2. Tolerance (ε)

**Type:** `fn`

```
20.0 + 0.3 * SNR_dB - 3.0 * acoustic_attenuation - 20.0 * speed_of_sound_error - 4.0 * shadowing
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |

## 4. Fingerprint

`18775d496d8f19a7d635ac35c59e6d896d7d382b51a95e64828e5b1b7933cc24`

## 5. On-chain Registration

- **Chain hash:** `0x58a00a58b5baa0d45e29493536b5eb40d295152aa174366355907584bd9ca028`
- **Chain tx hash:** `0xe4a9ae8fd002c0195ae3f96a99ea500f724572ba1be69afa7eb99b60b661ecba`
- **Chain block:** `41553388`

---

## File Mapping

This bundle consists of: `L2-032-001.md`, `L2-032-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-032-001.md` | Source of truth — edit this | Human or LLM |
| `L2-032-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |

**Prompt for your LLM after editing this Markdown:**

> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.

_This Markdown was auto-synthesized from the catalog row for `L2-032-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._