Printer impulsive noise metrics: Sensitivity and repeatability analysis.
Terry Baird, Katy Ferguson · The Journal of the Acoustical Society of America · 2010
The major cause of annoyance from impulsive noise is the impulsive amplitude. Many methods can characterize impulsive amplitude, such as time-averaged measures, peak amplitudes or real-time levels. For example, the “impulsive noise index” described by ISO 11201 or the “impulsive parameter” described in ISO 7779 are time-averaged metrics. Real-time metrics might include peak sound pressure level or peak loudness in the time domain. Impulsive metrics must be evaluated for effectiveness. That is, the metric must agree with the perceived impulsive amplitude. Impulsive metrics must also be practical. They must be insensitive to sample-to-sample variation while still providing the granularity between passing and failing results. This paper focuses on evaluating the sensitivity, measurement repeatability, and result granularity to determine the practicality of various effective impulsive noise metrics.