Room Acoustic measurements in non Sabinian enclosures for music: echometry, modal analysis,sound decay analysis

摘要

The article reviews modern techniques for analyzing room response of small spaces for listening, recording and rehearsing music both in the time and the frequency domain. After a brief review of theories and norms it discusses the techniques using actual measurement results as examples. This allows to show typical non-Sabinian behaviors of small rooms with short time decays (Volume ＜ 100 m~3, T30 ＜ 0.5 sec). The study of single reflections, modal perduration in time and frequency distribution allows to point out and verify the phenomena that can be controlled by the acoustic designer through surface treatment, source-receiver positioning and room shape modification.