Microphone Placement Reference
Return placement controls for reducing local surface-reflection bias in environmental measurements.
Description
Microphone height and distance from façades or other reflecting surfaces must follow the stated measurement standard and assessment objective.
Microphone height and distance from façades or other reflecting surfaces must follow the stated measurement standard and assessment objective. This reference explains the selected concept and the evidence needed to interpret it.1
The returned values include Source, Statement, Topic. The How section below explains the calculation, input rules and interpretation.
When to use Microphone Placement Reference
Use Microphone Placement Reference when you need to evaluate the supplied records under the calculation and evidence rules below. A tripod height alone cannot eliminate reflections; geometry, incidence, field type, and correction method remain relevant. This is an introductory excerpt, not the complete standard, a current compliance check or a project-specific calculation.
Choose the measured quantities, units, weighting and measurement basis before entering values. For a reference, select the exact topic. For a catalog lookup, prepare complete source-backed records; for a screen, select an applicable caller limit.
How to use Microphone Placement Reference and understand its results
- Choose the measured quantities, units, weighting and measurement basis before entering values. For a reference, select the exact topic. For a catalog lookup, prepare complete source-backed records; for a screen, select an applicable caller limit.
- Enter topic using the field table and calculation rules, then run the tool.
- Read source, statement, topic. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| topic | Reference topic to return. | string; one of "clearance", "weather", "caution" | Required |
Choose one of the exact topic values in the table. The tool indexes a fixed, locally embedded reference entry and returns its source label, statement and unchanged topic. It does not fetch the source or update the wording. Topic meanings and all returned entries are shown below.
| Selection | Returned reference entry |
|---|---|
| clearance | source: ISO 1996 series and applicable measurement protocol; statement: Microphone height and distance from façades or other reflecting surfaces must follow the stated measurement standard and assessment objective.; topic: clearance |
| weather | source: ISO 1996 series; statement: Wind, rain, temperature gradients, and ground condition can affect results and should be documented with the prescribed windscreen.; topic: weather |
| caution | source: Environmental acoustics measurement practice; statement: A tripod height alone cannot eliminate reflections; geometry, incidence, field type, and correction method remain relevant.; topic: caution |
selected exact topic → embedded source label, explanatory statement and topic Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| source | Source used for the reference statement. | string |
| statement | Narrow reference statement for the selected topic. | string |
| topic | Selected reference topic. | string; one of "clearance", "weather", "caution" |
{
"input": {
"topic": "clearance"
},
"output": {
"source": "ISO 1996 series and applicable measurement protocol",
"statement": "Microphone height and distance from façades or other reflecting surfaces must follow the stated measurement standard and assessment objective.",
"topic": "clearance"
}
}Limitations and assumptions
A tripod height alone cannot eliminate reflections; geometry, incidence, field type, and correction method remain relevant. This is an introductory excerpt, not the complete standard, a current compliance check or a project-specific calculation.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Extremely large text inputs are rejected. Missing fields without a declared default, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Microphone Incidence Reference: A free-field microphone is designed so its presence and diffraction are compensated for sound arriving from the specified frontal direction. This reference explains the selected concept and the evidence needed to interpret it. For a complementary task, use Calibration Drift Screen: Before-and-after calibrator readings can reveal drift during a sound measurement session. An explicit acceptance allowance determines the screen.
References
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Microphone Placement Reference — tool.io
Similar or alternative tools
- Microphone Incidence Reference
A free-field microphone is designed so its presence and diffraction are compensated for sound arriving from the specified frontal direction. This reference explains the selected concept and the evidence needed to interpret it.
- Calibration Drift Screen
Before-and-after calibrator readings can reveal drift during a sound measurement session. An explicit acceptance allowance determines the screen.