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Trane TRG-TRC007-EN manual Fundamentals of Hvac Acoustics

Models: 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

Page 3 Page 5

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Trane TRG-TRC007-EN manual Fundamentals of Hvac Acoustics

Page 3 Page 5

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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 MethodsHuman Ear Response Loudness Contours Single-Number Rating Methods Response to TonesSingle-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 Trane

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