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TRG-TRC007-EN
manual
Fundamentals of Hvac Acoustics
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TRG-TRC007-EN
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Setting a Design Goal
Weight
What is
Sound Power and Sound Pressure
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Fundamentals of HVAC Acoustics
One of the Fundamental Series
A publication of
Trane, an American
Standard Company
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Contents
Air Conditioning Clinic Fundamentals of Hvac Acoustics
Business Reply Mail
Comment Card
One of the Fundamental Series
Fundamentals of Hvac Acoustics
Preface
Fundamentals of Hvac Acoustics
Contents
TRG-TRC007-EN
Fundamentals of Sound
Fundamentals of Sound
What is Sound?
What is Sound?
Sound Wave and Frequency
Wavelength
Broadband Sound
Broadband Sound and Tones
Octave Bands
Octave Bands
Logarithmic sums
One-Third Octave Bands
Sound Power and Sound Pressure
Sound Power and Sound Pressure
An Analogy
DB = 10 log
Decibel
Logarithmic Scale
10 ´ log
Equation for Sound Power
Equation for Sound Pressure
Logarithmic Addition of Decibels
50 dB + 44 dB = 51 dB
Human Ear
Sound Perception Rating Methods
Human Ear Response
Loudness Contours
Single-Number Rating Methods
Response to Tones
Single-Number Rating Methods
C Weighting
Sound Perception and Rating Methods
Weighting Example
Weighting
Noise Criteria NC Curves
NC-39
Room Criteria RC Curves
MPa DB ref Pressure
Sound Perception and Rating Methods
RC-31 R
Phon and Sone
Octave-Band Rating Method
Octave-Band Rating Method
Acoustical Analysis
Acoustical Analysis
Setting a Design Goal
Setting a Design Goal
Acoustical Analysis
Acoustical Analysis
Source-Path-Receiver Analysis
Source-Path-Receiver Model
Typical Sound Paths
Airborne
Examples of a Single Sound Path
Example of Multiple Sound Paths
Identifying Sound Sources and Paths
Modeling Sound Paths
Sound-Path Modeling
Supply
Algorithms for Sound-Path Modeling
Computerized Analysis Tools
Attenuation and Regeneration
Terms Used in Sound-Path Modeling
Sound Transmission
Insertion loss IL Noise reduction NR Transmission loss TL
Absorption
Reflected Sound
Receiver Sound Correction
Equipment Sound Rating
Equipment Sound Rating
Free Field
Fields of Measurement
= L p1 20 log
Distance Correction in a Free Field
Lot
Near Field
Reverberant Field
Semireverberant Field
Rating Hvac Equipment
Hvac Equipment Sound Rating
Reverberant-Room Method
Free-Field Method
Industry Standards
Ducted Air-Handling Equipment
Air Handler Test Configurations
Former Methods of Sound Testing
ARI Standard
Sound Power by Octave Band
Review
Review-Period One
Review-Period Two
Noise criteria NC Room criteria RC
Review-Period Three
Review-Period Four
Review
Quiz
Questions for Period
Octave-band frequency, Hz
Answers
Glossary
Glossary
Room effect See receiver room correction
Glossary
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