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Acoustic liner mounting device applied to microphone array method acoustic impedance test system

A microphone array and impedance testing technology, which is applied in the field of acoustic experiments, can solve the problems of low assembly precision and low measurement precision of acoustic impedance test, and achieve the effects of high installation precision, high test result precision and high sealing performance

Pending Publication Date: 2021-04-02
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Abstract
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Problems solved by technology

[0004] The invention provides an acoustic lining installation device applied to the microphone array method acoustic impedance testing system, aiming to solve the problems of low assembly accuracy of the current acoustic lining installation device and low measurement accuracy of the acoustic impedance test

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  • Acoustic liner mounting device applied to microphone array method acoustic impedance test system
  • Acoustic liner mounting device applied to microphone array method acoustic impedance test system
  • Acoustic liner mounting device applied to microphone array method acoustic impedance test system

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Embodiment Construction

[0030] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", etc. or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather t...

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Abstract

The invention provides an acoustic liner mounting device applied to a microphone array method acoustic impedance test system. The acoustic liner mounting device comprises an acoustic liner mounting groove and an acoustic liner which are connected with an acoustic liner experiment test section; ear plates are arranged at the two ends of the top surface of the acoustic liner mounting groove, and areembedded into the acoustic liner experiment test section; steps matched with the acoustic liner are arranged on the ear plates on the two sides, and the acoustic liner is installed in the acoustic liner mounting groove through the steps. the top surface of the acoustic liner mounting groove is flush with the acoustic liner experiment test section, and the airflow surface of the acoustic liner isflush with the airflow surface of the acoustic liner mounting groove. According to the acoustic liner mounting device applied to the microphone array method acoustic impedance test system, the problems of low assembly precision, poor sealing performance and low measurement precision of an existing acoustic liner mounting device are well solved.

Description

technical field [0001] The invention relates to the technical field of acoustic experiments, in particular to an acoustic lining installation device applied to a microphone array method acoustic impedance testing system. Background technique [0002] Noise control generally starts with two routes. One is to start with the sound source itself and study the mechanism of noise generation. The second is to carry out noise reduction treatment on the noise transmission path, that is, the design of the pipeline acoustic lining, and lay the acoustic lining on the sound transmission path. This is one of the most important passive noise control methods including aero-engines and various fans. means, but also the most effective method. After decades of development, people have gained a lot of understanding of the noise reduction mechanism of the acoustic lining, and the sound absorption performance of the acoustic lining has made great progress. Acoustic lining technology has a wide ...

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Application Information

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IPC IPC(8): G01H15/00
CPCG01H15/00
Inventor 何敬玉张立松李广良张江秦永明
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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