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1.发明授权公开(公告)号：US11388509B2
公开(公告)日：2022-07-12
申请号：US17029793
申请日：2020-09-23
摘要： An acoustic reflector for a microphone to measure flyover noise generated by an aircraft. The microphone is configured to measure flyover noise generated by an aircraft flying on a preset path. The acoustic reflector includes at least a central portion having the shape of an ellipse having a major axis and a plurality of peripheral portions distributed around the central portion. The acoustic reflector allows edge effects to be attenuated at the low frequencies of the noise to be measured.
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公开(公告)号：US09557211B2
公开(公告)日：2017-01-31
申请号：US14604224
申请日：2015-01-23
发明人： Philippe Bousquet , Osmin Delverdier , Stefan Moal
CPC分类号： G01H3/10 , B64F5/60 , G01H3/00 , H04R1/08 , H04R2499/13
摘要： An acoustic measurement device in an air flow and subjected to a noise source, the device including: a base having a surface in contact with the air flow, a first microphone which is mounted flush with the surface, a second and a third microphone which are mounted on either side of the first microphone, each, at the bottom of a cavity opening onto the surface, and where each of the second and third microphones is covered with a noise-reducing element, the second and the third microphones being assembled at a distance from the first microphone that is greater than the correlation length of the turbulent phenomenon in the frequency band studied, and a computer or processor provided for computing the power spectrum of the noise source from the signals detected by the three microphones.
摘要翻译： 一种气流中的声学测量装置，并经受噪声源，该装置包括：具有与空气流接触的表面的基座，与表面齐平安装的第一麦克风，第二和第三麦克风， 安装在第一麦克风的任一侧上，每个在位于表面上的空腔的底部，并且其中每个第二和第三麦克风被减噪元件覆盖，第二和第三麦克风被组装在 距离第一麦克风的距离大于研究的频带中的湍流现象的相关长度;以及计算机或处理器，用于根据由三个麦克风检测的信号计算噪声源的功率谱。
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3.发明申请公开(公告)号：US20210092513A1
公开(公告)日：2021-03-25
申请号：US17029793
申请日：2020-09-23
摘要： An acoustic reflector for a microphone to measure flyover noise generated by an aircraft. The microphone is configured to measure flyover noise generated by an aircraft flying on a preset path. The acoustic reflector includes at least a central portion having the shape of an ellipse having a major axis and a plurality of peripheral portions distributed around the central portion. The acoustic reflector allows edge effects to be attenuated at the low frequencies of the noise to be measured.
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