Towards the establishment of traceability in sound power in airborne sound, the present study focuses on the dissemination procedure. Aerodynamic reference sound sources were studied as potential transfer standards. Initially, the sources were examined in the up-to-present requirements. The core of the study is the correction required for the transition from calibration to in situ conditions. The influence of atmospheric pressure, ambient temperature and fan rotation speed was investigated and the corresponding correction was determined. A comparison to an existing correction was also performed. Near field effects were another part of the study. The related uncertainty was estimated in a transparent approach. The dependency of the uncertainty on the in situ and calibration condition values is also presented.

Spyros Brezas

Volker Wittstock

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。

Study on the Properties of Aerodynamic Reference Sound Sources

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