Radiation of sound wave through a lined duct with perforated end is analyzed rigorously. The problem considered is axisymmetric. By using the Fourier transform technique in conjunction with the Mode Matching method, the related boundary value problem is formulated as a Wiener-Hopf (W-H) equation. The Mode-Matching technique allows us to express the field component defined in the waveguide region in terms of normal modes. The solution involves a set of infinitely many expansion coefficients satisfying an infinite system of linear algebraic equations. The numerical solution of this system is obtained for different parameters of the problem such as the surface impedances, specific impedance of the perforated screen and their effects on the radiation phenomenon are shown graphically.

Burhan Tiryakioglu

Acta acustica united with Acustica

停止。 ACTA ACUSTICA 与 ACUSTICA 联合 (ACTA ACUST UNITED AC)，与欧洲声学协会 (EAA) 一起出版。这是一份国际声学同行评审期刊。它发表了关于声学领域所有主题的原创文章，例如： • 一般线性声学， • 非线性声学，宏观声学， • 气动声学， • 大气声学， • 水下声学， • 超声波， • 物理声学， • 结构声学， • 噪声控制， • 主动控制， • 环境噪声， • 建筑声学， • 室内声学， • 声学材料和超材料， • 音频信号处理和传感器， • 计算和数值声学， • 听力、听力学和心理声学， • 语音，• 音乐声学， • 虚拟声学， • 系统的听觉质量， • 动物生物声学， • 声学历史。

Acta Acustica united with Acustica is an international peer-reviewed journal published in collaboration with the European Acoustics Association (EAA). This journal publishes original research articles on all topics in the field of acoustics, including: general linear acoustics, nonlinear acoustics, macro acoustics, aeroacoustics, atmospheric acoustics, underwater acoustics, ultrasound, physical acoustics, structural acoustics, noise control, active control, environmental noise, architectural acoustics, room acoustics, acoustic materials and metamaterials, audio signal processing and sensors, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, virtual acoustics, auditory quality of systems, animal bioacoustics, and the history of acoustics.

《Acta Acustica united with Acustica》是与欧洲声学协会（EAA）联合出版的一本国际声学同行评审期刊。该期刊发表关于声学领域各个主题的原创研究文章，涵盖的内容包括：一般线性声学、非线性声学、宏观声学、气动声学、大气声学、水下声学、超声波、物理声学、结构声学、噪声控制、主动控制、环境噪声、建筑声学、室内声学、声学材料和超材料、音频信号处理和传感器、计算和数值声学、听力、听力学和心理声学、语音、音乐声学、虚拟声学、系统的听觉质量、动物生物声学以及声学历史。

Sound Radiation from the Perforated End of a Lined Duct

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