Leq Sample-Duration Screen
Compare an actual equivalent-level sample duration with an explicit protocol minimum; no universal minimum duration is assumed.
Description
A sound-level sample has a duration as well as a measured level.
A sound-level sample has a duration as well as a measured level. This screen checks an explicit minimum duration before the result is used.1
The returned values include Duration margin, Meets protocol minimum. The How section below explains the calculation, input rules and interpretation.
When to use Leq Sample-Duration Screen
Use Leq Sample-Duration Screen when you need to evaluate the supplied records under the calculation and evidence rules below. No universal minimum duration, Leq integration, representativeness or acoustic measurement quality is established.
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 Leq Sample-Duration Screen 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 actualDurationSeconds, requiredMinimumDurationSeconds using the field table and calculation rules, then run the tool.
- Read durationMarginSeconds, meetsProtocolMinimum. 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 |
|---|---|---|---|
| actualDurationSeconds | Actual sample duration (s) | number; minimum: 0 | Required |
| requiredMinimumDurationSeconds | Protocol minimum duration (s) | number; minimum: 0 | Required |
Enter finite strictly positive observed and required durations in seconds. Subtract required from observed and return the signed margin and inclusive duration flag.
marginSeconds=sampleSeconds−requiredSeconds; sufficient=marginSeconds≥0 Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| durationMarginSeconds | Duration margin (s) | number |
| meetsProtocolMinimum | Meets protocol minimum | boolean |
{
"input": {
"actualDurationSeconds": 900,
"requiredMinimumDurationSeconds": 600
},
"output": {
"durationMarginSeconds": 300,
"meetsProtocolMinimum": true
}
}Limitations and assumptions
No universal minimum duration, Leq integration, representativeness or acoustic measurement quality is established.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing fields without a declared default, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use Classroom Background-Noise Screen: Background noise in an unoccupied furnished classroom affects listening conditions. A measurement should be compared with an explicitly chosen applicable design limit. 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
-
Leq Sample-Duration Screen — tool.io
Similar or alternative tools
- Classroom Background-Noise Screen
Background noise in an unoccupied furnished classroom affects listening conditions. A measurement should be compared with an explicitly chosen applicable design limit.
- Calibration Drift Screen
Before-and-after calibrator readings can reveal drift during a sound measurement session. An explicit acceptance allowance determines the screen.