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 万美国成年人因噪音而导致听力损失，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，我们越来越意识到我们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，工程师和设计人员需要有效的方法将噪声测试数据纳入产品设计过程中。当前用于测量声功率（用于量化产品产生的噪声的指标）的标准和方法需要专门的声学室，因此声功率测试通常既昂贵又耗时。因此，甚至可能无法进行声功率测试，这限制了设计人员专注于并最大限度地减少产品噪声的能力。这项研究将重点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，可用于进行真正的原位测量，从而节省公司大量时间并提供改进的产品。存在许多用于测量声功率的标准。 然而，这些通常具有限制，例如需要特定的声场、反射表面以及无变化的背景噪声。 将开发一种新的基于振动的方法，旨在克服许多这些限制。 这种新方法将该结构视为一系列小型的独立辐射器，并通过计算辐射器之间的自阻抗和互阻抗来估计声功率。这些阻抗的表达式是针对简单的理想结构而开发的。本研究将利用这些表达式来验证从振动测量中获取声功率的方法。然后，它将重点开发理论和计算工具，以解释任意形状的结构、耦合的组合结构和组合结构的组件。通过将扩展计算工具的结果与现有标准的结果进行比较，将对这些更复杂的结构进行新方法的实验验证。通过克服现行标准的一些限制，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，但它将提供一种实用的基于振动的替代方案。该奖项反映了 NSF 的法定使命，并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，被认为值得支持。

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.