Steady-state loudness models fail for speech, music, and impulsive technical noises.

Evidence

Most natural sounds are not steady but strongly time dependent; the loudness of such sounds is also a function of time. Typical examples are speech or music, and also quite a few technical noises that sound impulsive or rhythmic where the loudness cannot be described by steady-state condition. Therefore, the loudness of single tone bursts as a function of the duration, and the loudness of sequences of sound bursts as a function of their repetition rate are of interest. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1229

Categorization

• XREF: Frames why temporal loudness models are needed — ties to the reader’s interest in psychoacoustics of real-world sounds vs. laboratory steady tones. — connects to: Noise annoyance cannot be captured by physical sound parameters alone. — Almo Farina, Soundscape Ecology: Principles,…, 1441