Roughness 70 Hz Reference
Return the documented 70 Hz maximum of the 1-asp roughness reference while distinguishing that demonstration from a universal prediction.
Description
Roughness reference stimuli tie perceptual units to specified carrier, level and modulation conditions.
Roughness reference stimuli tie perceptual units to specified carrier, level and modulation conditions. A nominal reference peak is not universal.1
Return the documented 70 Hz maximum of the 1-asp roughness reference while distinguishing that demonstration from a universal prediction.
When to use Roughness 70 Hz Reference
Use this tool to return the documented 70 Hz maximum of the 1-asp roughness reference while distinguishing that demonstration from a universal prediction.
Choose a supported reference topic, run an input-free reference with an empty object, or prepare the measured values and caller-supplied test records requested. Keep acoustic metrics, frequency, units and test conditions consistent.
How to use Roughness 70 Hz Reference and understand its results
- Choose a supported reference topic, run an input-free reference with an empty object, or prepare the measured values and caller-supplied test records requested. Keep acoustic metrics, frequency, units and test conditions consistent.
- Run the reference with an empty object {}. No input values or topic selection are required.
- Read asperCarrierHertz, asperLevelDecibels, asperModulationDepth, evidenceScope, peakModulationHertz, reference, universalPeak. 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 |
|---|---|---|---|
| (none) | Run the reference with an empty object {}. | No values required | Not applicable |
Run with an empty object. Return the fixed 1-asp reference parameters, evidence scope, bibliographic reference and universalPeak=false.
reference: carrier=1000Hz, level=60dB, depth=1, modulation=70Hz Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| asperCarrierHertz | 1-asp carrier frequency (Hz) | number |
| asperLevelDecibels | 1-asp level (dB SPL) | number |
| asperModulationDepth | 1-asp modulation depth | number |
| evidenceScope | Evidence scope | string |
| peakModulationHertz | Reference peak modulation frequency (Hz) | number |
| reference | Reference | string |
| universalPeak | Universal peak | boolean |
{
"input": {},
"output": {
"asperCarrierHertz": 1000,
"asperLevelDecibels": 60,
"asperModulationDepth": 1,
"evidenceScope": "The 70 Hz value is the modulation rate in the 1-asp reference stimulus and a near-maximum reported for some fully modulated high-carrier tones. It is not a universal roughness peak across carriers, modulation depth, spectra, levels, listeners, or procedures.",
"peakModulationHertz": 70,
"reference": "Fastl and Zwicker, Psychoacoustics: Facts and Models (2007), roughness definition and discussion.",
"universalPeak": false
}
}Limitations and assumptions
No signal, roughness calculation or listener measurement is provided. Carrier/spectrum/level and procedure can change observed maxima.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, 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 Acoustic Sharpness Reference: Return the definition, unit, reference sound, and interpretation cautions for psychoacoustic sharpness. For a complementary task, use One-Decibel JND Reference: Return the nominal 1 dB level-difference reference with the psychophysical conditions required before it can be called a just-noticeable difference.
References
-
Roughness 70 Hz Reference — tool.io
Similar or alternative tools
- Acoustic Sharpness Reference
Return the definition, unit, reference sound, and interpretation cautions for psychoacoustic sharpness.
- One-Decibel JND Reference
Return the nominal 1 dB level-difference reference with the psychophysical conditions required before it can be called a just-noticeable difference.