Sound is a critical consideration in the selection and application of fans. Despite this, fan sound remains one of the least understood topics in the air handling industry.
This series of articles provides a better understanding and point of reference on how fan sound is developed, rated, applied, and controlled.
- Understanding the Development of Fan Sound Data and the Product Rating Process (FA/120-23)
Products that are independently third-party tested and performance certified assure the specifying engineer, installing contactor, and facility owner that the products and equipment installed will perform as stated by the manufacturer. This article provides an overview and insight into the thoroughness with which products are tested and rated for acoustic performance.
- The Basics of Fan Sound (FA/121-23)
Fan sound values should be obtained for every fan selection and compared to available acceptance criteria up front in the design stages. This will help provide the assurance necessary for a successful application. This article discusses the nature of sound, sound terminology, different methods of rating fans for sound, and typical calculations.
- Radiated Sound (FA/122-23)
Radiated sound is an important consideration in any low-sound application. Understanding the sources of radiated sound and available techniques for attenuating it is essential to a successful fan application. This article outlines how radiated sound is developed, rated, applied, and controlled.
- Sound Criteria, Attenuation Techniques, and Preventive Measures to Limit Sound Problems (FA/123-23)
This article contains descriptions of the most common sound criteria and the approaches used to attenuate sound if the criteria are not satisfied. Some commonsense approaches to minimizing the likelihood of sound problems are also included.
