Amplitude Modulation Depth
Calculate peak-to-trough sound-level modulation depth and compare it with an explicit caller threshold; this is not a full regulatory OAM method.
Description
Peak-to-trough sound-level modulation depth summarizes variation between two measured levels.
Peak-to-trough sound-level modulation depth summarizes variation between two measured levels. An explicit threshold gives a simple amplitude-modulation screen.1
The returned values include Peak-to-trough depth, Meets caller threshold. The How section below explains the calculation, input rules and interpretation.
When to use Amplitude Modulation Depth
Use Amplitude Modulation Depth when you need to evaluate the supplied records under the calculation and evidence rules below. No time series, modulation frequency or complete regulatory objective amplitude modulation method is analyzed.
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 Amplitude Modulation Depth 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 maximumLevelDecibels, minimumLevelDecibels, thresholdDecibels using the field table and calculation rules, then run the tool.
- Read depthDecibels, meetsCallerThreshold. 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 |
|---|---|---|---|
| maximumLevelDecibels | Maximum level (dB) | number | Required |
| minimumLevelDecibels | Minimum level (dB) | number | Required |
| thresholdDecibels | Caller modulation threshold (dB) | number; minimum: 0 | Required |
Enter finite maximum/minimum decibel levels with maximum at least minimum and a finite nonnegative threshold. Return finite depth and an inclusive meets-threshold flag.
depth=maximum−minimum; meets=depth≥threshold Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| depthDecibels | Peak-to-trough depth (dB) | number; minimum: 0 |
| meetsCallerThreshold | Meets caller threshold | boolean |
{
"input": {
"maximumLevelDecibels": 45,
"minimumLevelDecibels": 40,
"thresholdDecibels": 3
},
"output": {
"depthDecibels": 5,
"meetsCallerThreshold": true
}
}Limitations and assumptions
No time series, modulation frequency or complete regulatory objective amplitude modulation method is analyzed.
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 Fluctuation Strength Reference: Fluctuation strength is generally strongest for slow amplitude modulation near 4 Hz under reference-like conditions. This reference explains the selected concept and the evidence needed to interpret it. For a complementary task, use Festival Noise Limit Screen: An event noise screen can conservatively add an explicit uncertainty allowance to a measured level before comparison. All values need the same weighting and assessment interval.
References
-
Amplitude Modulation Depth — tool.io
Similar or alternative tools
- Fluctuation Strength Reference
Fluctuation strength is generally strongest for slow amplitude modulation near 4 Hz under reference-like conditions. This reference explains the selected concept and the evidence needed to interpret it.
- Festival Noise Limit Screen
An event noise screen can conservatively add an explicit uncertainty allowance to a measured level before comparison. All values need the same weighting and assessment interval.