Wavelength ↔ Frequency (Sound) Converter implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t4-049

Effect

Computation or source lookup only

Input and validation requirements

The inverse wavelength-to-frequency operation is undefined for zero wavelength, and the specification does not state an input-domain rejection rule. A temperature-unit ambiguity can also produce materially different results if a bare value such as 68 is interpreted as Fahrenheit rather than the specified Celsius.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "frequency_hz": 440,
    "air_temperature_c": 20
  },
  "expected_outputs": {
    "speed_of_sound_m_per_s": 343.42,
    "wavelength_m": 0.7805
  },
  "working": "c = 331.3 + (0.606 × 20) = 331.3 + 12.12 = 343.42 m/s.\nλ = c/f = 343.42/440 = 0.7805 m."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche4/tranche4-results.json