Speed of sound vs temp API

Computes the speed of sound in dry air as c = 331.3·sqrt(1 + T/273.15) with the linear approximation for comparison. Answers 'How fast does sound travel at this temperature?', 'How much does the speed of sound change with heat?'.

Price$0.02per request

MethodPOST

Route/v1/engineering/speed-of-sound-air

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

acousticsspeed-of-soundtemperatureairsound-velocityatmospherephysicshvac

API URLhttps://x402.hexl.dev/v1/engineering/speed-of-sound-air

Integration docs

Example request

{
  "temperatureC": 20
}

Example response

{
  "speedMps": 343.2146,
  "linearApproxMps": 343.42,
  "temperatureC": 20,
  "temperatureK": 293.15,
  "interpretation": "Sound travels at 343.21 m/s in dry air at 20 °C."
}

Input schema

{
  "type": "object",
  "required": [
    "temperatureC"
  ],
  "properties": {
    "temperatureC": {
      "type": "number",
      "description": "Air temperature (°C)",
      "examples": [
        20
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}