Measurement of Sound Absorption Using a Single Fixed Microphone in a Circular Pulse-Tube

Q1 Arts and Humanities

Acta Acustica united with Acustica Pub Date : 2019-11-01 DOI:10.3813/aaa.919399

Zheng-yu Wei, H. Hou, Nansha Gao, Yunke Huang, Jianhua Yang

引用次数: 1

Abstract

This study presents a method for measuring the normal incidence sound absorption coefficient of acoustical materials by separating the incident and first reflected waves in the time domain using a pulse-tube with only a single microphone whose position is fixed. Based on the pulse generation technique, the effect of the characteristics of tube termination can be eliminated, and the drive signal used for the measurement is obtained. A moveable piston is used to move the sample to a certain position in the tube, which renders the recorded incident and first reflected waves separated. As a validation of the proposed method, two different materials are investigated. Good agreement is found between the proposed method and both the well-established two-microphone transfer function (TMF) method and the verified pulse separation method.

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在圆形脉冲管内使用单个固定麦克风测量吸声

本文提出了一种测量声学材料法向入射吸声系数的方法，该方法是在时域内利用一个只有固定位置的单麦克风的脉冲管分离入射波和第一反射波。基于脉冲产生技术，可以消除管端特性的影响，获得用于测量的驱动信号。使用可移动活塞将样品移动到管中的某个位置，从而使记录的入射波和第一反射波分离。为了验证所提出的方法，研究了两种不同的材料。该方法与已建立的双传声器传递函数(TMF)方法和已验证的脉冲分离方法具有良好的一致性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Acustica united with Acustica 物理-声学

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

6.8 months

期刊介绍： Cessation. Acta Acustica united with Acustica (Acta Acust united Ac), was published together with the European Acoustics Association (EAA). It was an international, peer-reviewed journal on acoustics. It published original articles on all subjects in the field of acoustics, such as • General Linear Acoustics, • Nonlinear Acoustics, Macrosonics, • Aeroacoustics, • Atmospheric Sound, • Underwater Sound, • Ultrasonics, • Physical Acoustics, • Structural Acoustics, • Noise Control, • Active Control, • Environmental Noise, • Building Acoustics, • Room Acoustics, • Acoustic Materials and Metamaterials, • Audio Signal Processing and Transducers, • Computational and Numerical Acoustics, • Hearing, Audiology and Psychoacoustics, • Speech, • Musical Acoustics, • Virtual Acoustics, • Auditory Quality of Systems, • Animal Bioacoustics, • History of Acoustics.