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Although the theoretical fundamentals of acoustic environments have long been established, the influence of classroom acoustics on speech understanding, concentration, learning efficiency, and long-term cognitive development has only recently gained scientific attention. School-aged children are expected to develop strong listening skills, yet poor acoustic conditions hinder speech perception, phonetic recognition, and increase cognitive load. Since the early 2000s, many countries have updated standards for acoustic comfort. However, regulations specifically addressing schools have only recently gained traction, with few countries implementing dedicated frameworks. The United Kingdom and the United States were the first to establish detailed standards and guidelines based on empirical research, serving as a foundation for other nations to develop their own policies. A review of existing standards shows that background noise levels are frequently limited to 30–40 dB(A), while reverberation times range from 0.4 to 0.7 seconds, depending on students’ age, specific needs, and activities. Despite these benchmarks, research indicates that most countries lack schoolspecific acoustic regulations; they are either absent or integrated into general building codes. Moreover, current regulations largely focus on limiting undesirable sound rather than promoting beneficial acoustic qualities or adopting a broader interdisciplinary approach that also involves architectural, pedagogical, psychological, and cognitive criteria.
educational buildings, classroom acoustics, national regulations, speech perception, learning environment
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