DIN ISO 226:2025-09 Acoustics - Normal equal-loudness-level contours (ISO 226:2023); Text in German and English

标准编号：DIN ISO 226:2025-09

英文标题：Acoustics - Normal equal-loudness-level contours (ISO 226:2023); Text in German and English

德文标题：Akustik - Norm-Isophonen (ISO 226:2023); Text Deutsch und Englisch

发布日期：2025-09

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