Basic Documentation

Chapter 1–Introduction
Chapter 1 introduces laboratory control and safety solutions. It includes the following topics:
• Scope of this guide
• HVAC sound transmission
• Background sound
• Laboratory applicability
• Computer program sound analysis
Scope of This Guide
This application guide focuses on HVAC air movement and distribution system generated
sound. It does not specifically address sound or vibration problems of other related
mechanical system components such as boilers, chillers, cooling towers, pumping, and
piping systems. It is the intent of this document to provide sufficient background information
in the basics of sound and its application to air systems to enable the reader to properly use
equipment manufacturer’s sound rating data in the design of a ventilation system.
Sound and vibration are a science in themselves and an all-inclusive study is beyond the
scope of this guide. Additionally, it is believed that the reader need not delve too deep into
the theory to achieve a practical working knowledge of the subject.
For these reasons, this guide will limit its approach to only the essential elements of
acoustics theory and will attempt to emphasize practicality rather than theory whenever
possible. For those readers who want more background on the subject or need additional
information, the Suggested Reference Materials section in the About this Application Guide
lists a number of books, and other sources of more detailed and specialized technical
information on the subject of HVAC sound and vibration.
The information in this guide should assist in handling typical ventilation system design
applications for offices, laboratories, classrooms, and the like. However, the reader is
cautioned that more specific and detailed knowledge is warranted if the system design is
intended for applications where sound is a much more critical issue. This includes acoustical
laboratories, recording studios, and any location where maintaining a very low or specific
sound level is crucial. If any of these types of applications are a part of an HVAC design
project, it is recommended that the designer consult an appropriate acoustical or sound
specialist for guidance.
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