Public evidence

physics.acoustics.doppler

Machine-checked verification for calculation version 1.0.0 · tier expert_verified

Open calculator API Capability Download JSON CVP Manifest MCP Review policy

CVP: CVP VERIFIED · CVP protocol 1.0.0-proposed · Engineering assurance· 1D source/observer in air · Protocol · Schema · Production report

Declared partition coverage: PASS · 2/2 declared partitions (doppler, invalid-domain)
Versions: Calculation 1.0.0 · CVP protocol 1.0.0-proposed
CVP identity: 1/1 property · digest 4607b82cec2b

Verification

Legacy regression suite: 4/4 calculation tests · Production surface contract 4/4

Three distinct suites: educational examples on the calculator page, this legacy regression count (4/4 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

This calculator CURRENT · Public schema 1.0.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Calculation version 1.0.0. CVP 1.0.0-proposed. 1/1 golden · 2/2 CVP boundary · 2/2 invalid · 1/1 property · 1/1 cross-interface · 1/1 CVP contract. digest 4607b82cec2b.

Golden (oracle-backed) 1 / 1
CVP boundary 2 / 2
Invalid input 2 / 2
Property 1 / 1
Cross-interface 1 / 1
CVP contract 1 / 1
Interfaces PASS · UI (SSR) / REST / MCP
Interface claim ui-ssr is query-result HTML, not a live browser session.
Assurance Engineering

release artifacts aligned PASS
schema valid input executes PASS
engine success output validates schema PASS
schema rejects incomplete input PASS

Fingerprint sha256:c84e2eaa29f5fd28b0f69a26736039e57ea254472987518699b05cdb5a82d38e

Input schema sha256:8ccc5ab7c2409161053a0819803779e6c9917117463ddaefca1f99daa96b7e35 · Output schema sha256:dbece0ae3e179c9590e9016f5b3357b8edb662619c22df62f2dd6a1f98ef7d39 · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool: doppler
Engine: doppler
Engine build: 2026-09-10
Evidence core: 2026-09-06T13:16:40.891Z
Rendered: 2026-09-16T22:03:43.762Z
Last reviewed: 2026-08-09

Limitations

1D classical; default air speed 343 m/s

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

Intro physics / IEC / NIST units — standard relations
Supports: engine formulas
ISO 80000-8 — Acoustics — Doppler effect
Supports: f′ = f·(v±vo)/(v∓vs)

Legacy published checks

Golden and boundary cases from the legacy Evidence JSON. CVP property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the Manifest — including SKIP when a suite has no vectors.

ID	Kind	Status	Detail
`obs`	golden	pass	Expected f_obs_Hz=1111.111111111111 · Actual mode=f_obs · f_Hz=1000 · f_obs_Hz=1111.111111111111 · v_m_s=343 · vo_m_s=0 · vs_m_s=34.3 · observer_toward=true · source_toward=true
`bad`	boundary	pass	Expected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
`boundary-doppler-bad`	boundary	pass	Expected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
`property-doppler-f`	property	pass	1000