Acoustic absorptivity 是指材料的吸音性能，即材料能够吸收声音的能力。它通常用于描述材料对声音的吸收和阻尼效果。
在英文范文方面，我可以为您提供一份示例文章，这是一篇关于建筑材料的吸音性能的研究报告：
Title: Effects of Different Materials on Acoustic Absorptivity
Abstract: This study investigates the acoustic absorptivity of various building materials, including wood, fiberglass, and mineral-based隔音材料. We aim to identify the optimal material for reducing sound transmission in indoor environments.
Introduction: Soundproofing materials are essential for reducing noise in indoor environments, such as offices, homes, and public spaces. Various materials have different acoustic absorptivity properties, and selecting the right material can significantly improve soundproofing effectiveness.
Methodology: We tested the acoustic absorptivity of three different materials using laboratory measurements and field experiments. We compared the sound absorption rates of each material under different sound frequencies and sound levels.
Results: The results showed that mineral-based隔音材料 had the highest acoustic absorptivity among the three materials tested. It effectively reduced sound transmission at all frequencies and sound levels tested. Wood had a moderate absorptivity, but its soundproofing effectiveness was limited by its flammability and moisture absorption properties. Fiberglass had a relatively low absorptivity, but it was more expensive and had other disadvantages.
Conclusion: Based on the results of this study, mineral-based隔音材料 is recommended as the best soundproofing material for indoor environments due to its high acoustic absorptivity and low cost.
Acoustic absorptivity is an important property of soundproofing materials that determines their effectiveness in reducing sound transmission. By selecting the right material, building designers can improve the soundproofing performance of their spaces and create a more comfortable and quiet environment for their occupants.
Acoustic absorptivity是指材料的吸音性能。它描述的是材料对声音的吸收和阻尼能力。
在英文范文当中，acoustic absorptivity可能会在讨论建筑材料、声学设计或者环境控制等领域中出现。例如，在建筑设计中，工程师可能会选择具有高吸音性能的材料来减少室内噪音，提高音质。
请注意，以上信息可能随着时间和技术的发展而变化，建议查阅最新的英文范文以获取最准确的信息。
acoustic absorptivity是指材料对声音的吸收能力。
在英文范文中最新的变化可能是作者或科学家在讨论某种特定的材料或设计，以增强其对于声音的吸收能力。他们可能会讨论材料的厚度、纹理、微观结构，甚至环境因素如何影响其吸收性能。这些讨论通常会在物理、声学、建筑、工程等领域的学术论文或报告中出现。