Leaf-Blower Tonality Reference
Return measurement cautions for low-frequency and tonal leaf-blower noise without assigning annoyance from a device label.
Description
Blade-pass and engine components can create prominent tones, but tonality must be established from measured spectra using the specified method.
Blade-pass and engine components can create prominent tones, but tonality must be established from measured spectra using the specified method. 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 Leaf-Blower Tonality Reference
Use Leaf-Blower Tonality Reference when you need to evaluate the supplied records under the calculation and evidence rules below. The reference does not measure, model or certify the supplied situation. 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 Leaf-Blower Tonality 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 "tonality", "low-frequency", "annoyance" | 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 |
|---|---|
| tonality | source: ANSI/ASA S1.13 or ECMA-74 tonal-analysis context; statement: Blade-pass and engine components can create prominent tones, but tonality must be established from measured spectra using the specified method.; topic: tonality |
| low-frequency | source: ISO 1996 environmental-noise assessment context; statement: Low-frequency propagation and façade transmission differ from A-weighted broadband behavior, so octave or one-third-octave data may be needed.; topic: low-frequency |
| annoyance | source: WHO environmental-noise guidance; statement: Annoyance depends on level, duration, time, modulation, context, and the affected population; equipment type alone is not a verdict.; topic: annoyance |
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 "tonality", "low-frequency", "annoyance" |
{
"input": {
"topic": "tonality"
},
"output": {
"source": "ANSI/ASA S1.13 or ECMA-74 tonal-analysis context",
"statement": "Blade-pass and engine components can create prominent tones, but tonality must be established from measured spectra using the specified method.",
"topic": "tonality"
}
}Limitations and assumptions
The reference does not measure, model or certify the supplied situation. 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 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 Amplitude Modulation Depth: Peak-to-trough sound-level modulation depth summarizes variation between two measured levels. An explicit threshold gives a simple amplitude-modulation screen.
References
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Leaf-Blower Tonality Reference — 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.
- Amplitude Modulation Depth
Peak-to-trough sound-level modulation depth summarizes variation between two measured levels. An explicit threshold gives a simple amplitude-modulation screen.