Distance sound attenuation API

Applies the inverse-square law for a point source, ΔL = 20·log10(d1/d2) (~6 dB per doubling), to find the sound level at a new distance. Answers 'How much quieter is it twice as far away?', 'What dB level reaches the receiver at this distance?'.

Price$0.02per request

MethodPOST

Route/v1/engineering/inverse-square-attenuation

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

acousticsinverse-squareattenuationdistancedecibelpoint-sourcenoisephysics

API URLhttps://x402.hexl.dev/v1/engineering/inverse-square-attenuation

Integration docs

Example request

{
  "referenceLevelDb": 100,
  "referenceDistanceM": 1,
  "targetDistanceM": 2
}

Example response

{
  "targetLevelDb": 93.9794,
  "attenuationDb": 6.0206,
  "distanceRatio": 2,
  "interpretation": "Level falls from 100 dB at 1 m to 94 dB at 2 m (−6.02 dB)."
}

Input schema

{
  "type": "object",
  "required": [
    "referenceLevelDb",
    "referenceDistanceM",
    "targetDistanceM"
  ],
  "properties": {
    "referenceLevelDb": {
      "type": "number",
      "description": "Known level at reference distance (dB)",
      "examples": [
        100
      ]
    },
    "referenceDistanceM": {
      "type": "number",
      "description": "Reference distance (m)",
      "examples": [
        1
      ]
    },
    "targetDistanceM": {
      "type": "number",
      "description": "Target distance (m)",
      "examples": [
        2
      ]
    }
  }
}

Output schema

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