Speech loudness equals the value exceeded only seven percent of the time

Evidence

A statistical treatment displayed in Fig. 16.5 as cumulative loudness distribution reveals that the continuous speech noise produces almost the same loudness during the whole presentation (dotted) whereas the loudness of the sentence varies considerably with time (solid). The crossing point of the two curves in Fig. 16.5 indicates that the loudness of speech can be described by the percentile loudness N 7 , i.e. the loudness value reached or exceeded in 7% of the measurement time. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1770

Categorization

• DEFINE: Introduces percentile loudness N7 as the matching statistic for time-varying sounds.