Sound Quality Analyzer conducts Roughness analysis on audio WAV files.
Roughness (asper) – A measure of the high frequency (>20 Hz) modulation within a signal. Fast modulations are often described as “warble” or “buzz” sounds. When modulations are faster than 20 Hz the ear can no longer perceive the modulations as individual events but can detect variations in the envelope of the sound. The ear is highly sensitive to modulations around 70 Hz, so the sensitivity of the metric peaks at this modulation frequency. Values for Roughness in are typically less than 1 asper and may be expressed in centiaspers. Roughness is not a standardized metric. The SQA uses the Aures method of determination of Roughness.