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TRG-TRC007-EN
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Air Conditioning Clinic 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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Air Conditioning
Clinic
Fundamentals of HVAC Acoustics
One of the Fundamental Series
TRG-TRC007-EN
Page 2
Page 1
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Contents
Air Conditioning Clinic Fundamentals of Hvac Acoustics
Business Reply Mail
One of the Fundamental Series
Comment Card
Fundamentals of Hvac Acoustics
Fundamentals of Hvac Acoustics
Preface
Contents
TRG-TRC007-EN
Fundamentals of Sound
Fundamentals of Sound
What is Sound?
What is Sound?
Sound Wave and Frequency
Wavelength
Broadband Sound and Tones
Broadband Sound
Octave Bands
Octave Bands
Logarithmic sums
One-Third Octave Bands
Sound Power and Sound Pressure
Sound Power and Sound Pressure
An Analogy
Decibel
DB = 10 log
10 ´ log
Logarithmic Scale
Equation for Sound Pressure
Equation for Sound Power
50 dB + 44 dB = 51 dB
Logarithmic Addition of Decibels
Human Ear
Sound Perception Rating Methods
Human Ear Response
Loudness Contours
Single-Number Rating Methods
Response to Tones
Single-Number Rating Methods
Sound Perception and Rating Methods
C Weighting
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
Source-Path-Receiver Analysis
Acoustical Analysis
Source-Path-Receiver Model
Airborne
Typical Sound Paths
Example of Multiple Sound Paths
Examples of a Single Sound Path
Identifying Sound Sources and Paths
Sound-Path Modeling
Modeling Sound Paths
Supply
Algorithms for Sound-Path Modeling
Computerized Analysis Tools
Terms Used in Sound-Path Modeling
Attenuation and Regeneration
Sound Transmission
Insertion loss IL Noise reduction NR Transmission loss TL
Absorption
Reflected Sound
Receiver Sound Correction
Equipment Sound Rating
Equipment Sound Rating
Fields of Measurement
Free Field
Distance Correction in a Free Field
= L p1 20 log
Lot
Near Field
Reverberant Field
Semireverberant Field
Hvac Equipment Sound Rating
Rating Hvac Equipment
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-Period One
Review
Noise criteria NC Room criteria RC
Review-Period Two
Review-Period Three
Review-Period Four
Review
Questions for Period
Quiz
Octave-band frequency, Hz
Answers
Glossary
Glossary
Room effect See receiver room correction
Glossary
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