Development of a Vibration-based Acoustic Sound Power Measurement Method

基于振动的声学声功率测量方法的开发

• 批准号: 1916696
• 负责人: Scott Sommerfeldt
• 金额: $ 38.87万
• 依托单位: Brigham Young University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1916696&HistoricalAwards=false
• 关键词: Development; Vibration; based; Acoustic; Sound

As many as 40 million adult Americans have hearing loss from loud noise and 30 million Americans are exposed to hazardous noise levels every day. As a society, we are becoming more aware of excessive noise around us, and the discomfort and health problems it creates. To address this problem, engineers and designers need efficient methods to include noise test data in the product design process. Current standards and methods for measuring sound power, which is the metric used to quantify noise produced by a product, require specialized acoustic chambers such that sound power testing is typically expensive and time consuming. As a result, sound power testing may not even be done, which limits the ability of designers to focus on and minimize noise in their products. This research will focus on developing a new vibration-based sound power measurement method that will allow engineers to efficiently acquire and use noise data to improve their products. The new method is not limited by many of the restrictions of current sound power measurement standards and can be used to make truly in situ measurements saving companies significant time and providing improved products.A number of standards exist for measuring sound power. However, these typically have restrictions such as requiring specific acoustic fields, reflective surfaces, and no varying background noise. A new vibration-based method will be developed that is designed to overcome a number of these restrictions. This new method treats the structure as an array of small, individual radiators, and estimates the sound power through the calculation of self- and mutual-impedances between the radiators. Expressions for these impedances have been developed for simple ideal structures. This research will utilize these expressions to validate the method of obtaining the sound power from vibration measurements. It will then focus on developing the theoretical and computational tools to account for arbitrarily shaped structures, coupled built-up structures, and components of built-up structures. Experimental verification of the new method will be carried out for these more complex structures by comparing results using the extended computational tools with results from existing standards. By overcoming some of the restrictions of current standards, the new method will also be used for truly in-situ testing. The new method is not meant to replace all other methods, but it will provide a practical vibration-based alternative.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

多达4000万成年美国人因噪音而听力损失，每天有3000万美国人暴露在危险的噪音水平下。作为一个社会，我们越来越意识到周围的过度噪音及其造成的不适和健康问题。为了解决这个问题，工程师和设计师需要有效的方法，包括在产品设计过程中的噪声测试数据。用于测量声功率（其是用于量化由产品产生的噪声的度量）的当前标准和方法需要专门的声学室，使得声功率测试通常是昂贵且耗时的。因此，声功率测试甚至可能无法完成，这限制了设计人员关注和最大限度地减少产品噪声的能力。这项研究将专注于开发一种新的基于振动的声功率测量方法，使工程师能够有效地获取和使用噪声数据来改进他们的产品。新方法不受当前声功率测量标准的许多限制，可以用于进行真正的现场测量，节省公司大量时间并提供改进的产品。 然而，这些通常具有限制，例如需要特定的声场、反射表面以及没有变化的背景噪声。 将开发一种新的基于振动的方法，旨在克服这些限制。 这种新方法将结构视为一个小的，单独的辐射器阵列，并通过计算辐射器之间的自阻抗和互阻抗来估计声功率。这些阻抗的表达式已被开发为简单的理想结构。本研究将利用这些公式来验证从振动测量获得声功率的方法。然后，它将专注于开发理论和计算工具，以考虑任意形状的结构，耦合组合结构和组合结构的组件。新方法的实验验证将进行这些更复杂的结构，通过比较结果使用扩展的计算工具与现有标准的结果。通过克服当前标准的一些限制，新方法也将用于真正的现场测试。新方法并不意味着取代所有其他方法，但它将提供一个实际的振动为基础的替代品。这个奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

项目成果

Improved efficiency of vibration-based sound power computation through multi-layered radiation resistance matrix symmetry

通过多层辐射电阻矩阵对称性提高基于振动的声功率计算效率

• DOI: 10.1121/10.0015355
• 发表时间: 2022
• 期刊: JASA Express Letters
• 影响因子: 1
• 作者: Ebeling, John C.;Bacon, Ian C.;Bates, Trent P.;Sommerfeldt, Scott D.;Blotter, Jonathan D.
• 通讯作者: Blotter, Jonathan D.

Vibration-based sound power measurements of arbitrarily curved panels

任意弯曲面板的基于振动的声功率测量

• DOI: 10.1121/10.0009581
• 发表时间: 2022
• 期刊: The Journal of the Acoustical Society of America
• 作者: Bates, Trent P.;Bacon, Ian C.;Blotter, Jonathan D.;Sommerfeldt, Scott D.
• 通讯作者: Sommerfeldt, Scott D.

Sound power of vibrating cylinders using the radiation resistance matrix and a laser vibrometer

使用辐射电阻矩阵和激光振动计测量振动圆柱体的声功率

• DOI: 10.1121/10.0002870
• 发表时间: 2020
• 期刊: The Journal of the Acoustical Society of America
• 作者: Goates, Caleb B.;Jones, Cameron B.;Sommerfeldt, Scott D.;Blotter, Jonathan D.
• 通讯作者: Blotter, Jonathan D.

Experimental validation of determining sound power using acoustic radiation modes and a laser vibrometer

• DOI: 10.1016/j.apacoust.2020.107254
• 发表时间: 2020-07-01
• 期刊: APPLIED ACOUSTICS
• 影响因子: 3.4
• 作者: Jones, Cameron B.;Goates, Caleb B.;Sommerfeldt, Scott D.
• 通讯作者: Sommerfeldt, Scott D.