Percentile loudness N5 predicts how listeners judge overall noise immission loudness

Evidence

This subjective evaluation of overall loudness of a noise immission (expressed in mm line-length) can be compared with physical magnitudes of the noise immission. It turns out that in many cases the perceived overall loudness of noise immissions corresponds to the percentile loudness N5 measured by a loudness-meter. The value N5 is the loudness which is reached or exceeded in 5% of the measurement time. This means that N5 represents a loudness value close to the maxima of the loudness-time function of the noise immission. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1799

The data displayed in Fig. 16.11 as circles represent the subjective evaluation of the noise immissions illustrated in Fig. 16.10 and can be compared to data of physical measurements represented by stars. The line-length indicating the subjectively perceived overall loudness is given on the left ordinate, the correlated percentile loudness N5 on the right ordinate. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1803

Categorization

• DEFINE: Defines the percentile loudness N5 metric as the loudness reached or exceeded 5% of measurement time.
• corroborated: 3 independent passages support this claim — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1799; Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1803
• XREF: connects to: A-weighted decibels are a rough practical approximation of perceived loudness — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 633; Two competing loudness models predict time-variant loudness by peak tracking or frame averaging — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1659; Offices judged loud run percentile loudness of ten to twenty sone (+4 more)

Broader Connections

• Two competing loudness models predict time-variant loudness by peak tracking or frame averaging #expands (0.78) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1659
• A-weighted decibels are a rough practical approximation of perceived loudness #qualifies (0.75) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 633