{"id":28905,"date":"2024-10-17T03:07:51","date_gmt":"2024-10-17T03:07:51","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/smacna-hvacsoundandvibrationmanual-2004-01e\/"},"modified":"2024-10-24T14:07:20","modified_gmt":"2024-10-24T14:07:20","slug":"smacna-hvacsoundandvibrationmanual-2004-01e","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/smacna\/smacna-hvacsoundandvibrationmanual-2004-01e\/","title":{"rendered":"SMACNA HVACSoundandVibrationManual 2004 01E"},"content":{"rendered":"

Contractors charged with resolving complaints related to sound and vibration will find the first edition of SMACNA\u2019s HVAC Sound and Vibration Manual an in-depth HVAC-specific guide in the art of sound and vibration measurement and mitigation. This comprehensive book covers mechanical vibration, acoustical design of mechanical systems, sound generation and attenuations associated with ducts and fittings, mechanical equipment sound and vibration specifications and inspections, plus sound and vibration instrumentation and measurements. <\/span><\/p>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
5<\/td>\nFOREWORD <\/td>\n<\/tr>\n
6<\/td>\nHVAC SOUND AND VIBRATION TASK FORCE <\/td>\n<\/tr>\n
7<\/td>\nNOTICE TO USERS OF THIS PUBLICATION <\/td>\n<\/tr>\n
11<\/td>\nTABLE OF CONTENTS <\/td>\n<\/tr>\n
21<\/td>\nCHAPTER 1 BASICS OF SOUND AND THE ASSESSMENT OF SOUND
1.1 SOUND WAVES
FIGURE 1-1 PROPAGATION OF SOUND <\/td>\n<\/tr>\n
22<\/td>\n1.2 TYPES OF SOUND WAVES
FIGURE 1-2 SUCCESSIVE WAVE FRONTS FOR PLANE, CYLINDRICAL, AND SPHERICAL WAVES <\/td>\n<\/tr>\n
23<\/td>\n1.3 SOUND FIELDS OF SPHERICAL SOUND SOURCES
FIGURE 1-3 RADIATION FIELDS OF A SPHERICAL SOUND SOURCE
FIGURE 1-4 ACOUSTIC FREE AND REVERBERANT SOUND FIELDS <\/td>\n<\/tr>\n
24<\/td>\n1.4 SOURCE, PATH, AND RECEIVER
1.5 SOUND PRESSURE, SOUND INTENSITY, AND SOUND POWER
FIGURE 1-5 SOURCE, PATH, AND RECEIVER
FIGURE 1-6 MECHANICAL EQUIPMENT ROOM ADJACENT TO OFFICE AREA <\/td>\n<\/tr>\n
25<\/td>\nFIGURE 1-7 SOUND ENERGY FLOWING OUTWARD FROM A SPHERICAL SOUND SOURCE THROUGH A SOLID ANGLE <\/td>\n<\/tr>\n
26<\/td>\n1.6 DECIBELS AND LEVELS
FIGURE 1-8 SOUND RADIATED BY A SPHERICAL SOUND SOURCE <\/td>\n<\/tr>\n
27<\/td>\nEXAMPLE 1-1
EXAMPLE 1-2 <\/td>\n<\/tr>\n
28<\/td>\n1.7 PRESENCE OF BACKGROUND SOUND
FIGURE 1-9 NOMOGRAM FOR COMBINING THE SOUND LEVELS OF UNCORRELATED SOUND SOURCES
FIGURE 1-10 NOMOGRAM FOR DETERMINING THE SOUND PRESSURE LEVEL OF A SOUND SOURCE IN THE PRESENCE OF BACKGROUND SOUND
FIGURE 1-11 A AND C WEIGHTING NETWORKS
EXAMPLE 1-3 <\/td>\n<\/tr>\n
29<\/td>\n1.8 WEIGHTING NETWORKS AND OCTAVE AND THIRD OCTAVE FREQUENCY BANDS
TABLE 1-1 ATTENUATION ASSOCIATED WITH WEIGHTING NETWORKS
FIGURE 1-12 NORMALIZED RESPONSE OF OCTAVE AND THIRD OCTAVE BAND FILTERS
FIGURE 1-13 RESPONSE CHARACATERISTICS OF A TYPICAL OCTAVE BAND FILTER SET <\/td>\n<\/tr>\n
30<\/td>\n1.9 HOW THE HUMAN EAR RESPONDS TO SOUND
TABLE 1-2 BAND LIMITS AND CENTER FREQUENCIES FOR OCTAVE FREQUENCY BANDS (Hz)
TABLE 1-3 SIGNIFICANT FREQUENCY RANGES FOR HEARING
FIGURE 1-14 THRESHOLDS OF HEARING <\/td>\n<\/tr>\n
31<\/td>\nTABLE 1-4 SUBJECTIVE RESPONSE CHARACTERISTICS OF THE EAR
TABLE 1-5 SUBJECTIVE EFFECTS TO CHANGES IN SOUND LEVELS
FIGURE 1-15 FREQUENCY RANGES OF MUSICAL INSTRUMENTS AND THE HUMAN VOICE <\/td>\n<\/tr>\n
32<\/td>\n1.10 INDOOR SOUND CRITERIA
FIGURE 1-16 EQUAL LOUDNESS CONTOURS FOR PURE TONES IN A FREE FIELD
FIGURE 1-17 NOISE CRITERIA (NC) CURVES
FIGURE 1-18 NC LEVEL FOR EXAMPLE 1.4 <\/td>\n<\/tr>\n
33<\/td>\nFIGURE 1-19 BALANCED NOISE CRITERIA (NCB) CURVES
EXAMPLE 1-4 <\/td>\n<\/tr>\n
34<\/td>\nFIGURE 1-20 NCB RATING FOR TOTAL BACKGROUND NOISE IN EXAMPLE 1-5
EXAMPLE 1-5 <\/td>\n<\/tr>\n
35<\/td>\nFIGURE 1-21 ROOM CRITERION (RC) CURVES <\/td>\n<\/tr>\n
36<\/td>\nFIGURE 1-22 RC RATING FOR BACKGROUND NOISE IN EXAMPLE 1-6
FIGURE 1-23 ROOM CRITERION (RC) CURVES FOR THE MARK II METHOD
EXAMPLE 1-6 <\/td>\n<\/tr>\n
37<\/td>\nFIGURE 1-24 RC RATING FOR BACKGROUND SOUND IN EXAMPLE 1-7
EXAMPLE 1-7 <\/td>\n<\/tr>\n
38<\/td>\nTABLE 1-6 DEFINITION OF THE SOUND QUALITY DESCRIPTOR AND THE QUALITY ASSESSMENT INDEX (QAI) TO AID IN INTERPRETING RC MARK II RATINGS FOR HVAC-RELATED SOUND <\/td>\n<\/tr>\n
39<\/td>\nTABLE 1-7 DESIGN GUIDELINES FOR HVAC RELATED BACKGROUND SOUND IN ROOMS RECOMMENDED BY ASHRAE
TABLE 1-8 LISTENING CONDITIONS AND TELEPHONE USE AS A FUNCTION OF NC CRITERIA <\/td>\n<\/tr>\n
40<\/td>\nTABLE 1-9 COMPARISON OF SOUND RATING METHODS <\/td>\n<\/tr>\n
43<\/td>\nCHAPTER 2 MECHANICAL VIBRATION
2.1 VIBRATION IN BUILDINGS
2.2 FUNDAMENTALS OF VIBRATION
FIGURE 2-1 ONE-DEGREE-OF-FREEDOM VIBRATING SYSTEM
FIGURE 2-2 HARMONIC MOTION <\/td>\n<\/tr>\n
44<\/td>\nFIGURE 2-3 AMPLITUDE AND PHASE RELATIONSHIPS BETWEEN DISPLACEMENT, VELOCITY AND ACCELERATION <\/td>\n<\/tr>\n
45<\/td>\nFIGURE 2-4 RELATION BETWEEN STATIC DEFLECTION, d, AND RESONANCE FREQUENCY, fN
FIGURE 2-5 VIBRATION ISOLATION SYSTEM WITH FOUR SPRINGS <\/td>\n<\/tr>\n
46<\/td>\nEXAMPLE 2-1 <\/td>\n<\/tr>\n
47<\/td>\n2. 3 VIBRATION CRITERIA
TABLE 2-1 VIBRATION CRITERIA CURVES ACCEPTABLE VIBRATION IN BUILDINGS FOR CONTINUOUS VIBRATION (CURVES REFER TO VALUES SPECIFIED FIGURE 2-5) <\/td>\n<\/tr>\n
48<\/td>\n2.4 VIBRATION ISOLATION: ONEDEGREE- OF-FREEDOM SYSTEMS
FIGURE 2-5 (I-P) BUILDING VIBRATION CRITERIA FOR VIBRATION MEASURED ON THE BUILDING STRUCTURE
FIGURE 2-5 (SI) BUILDING VIBRATION CRITERIA FOR VIBRATION MEASURED ON THE BUILDING STRUCTURE <\/td>\n<\/tr>\n
49<\/td>\nFIGURE 2-6 (I-P) EQUIPMENT VIBRATION SEVERITY RATING FOR VIBRATION MEASURED ON EQUIPMENT STRUCTURE OR BEARING CAPS
FIGURE 2-6 (SI) EQUIPMENT VIBRATION SEVERITY RATING FOR VIBRATION MEASURED ON EQUIPMENT STRUCTURE OR BEARING CAPS <\/td>\n<\/tr>\n
50<\/td>\nFIGURE 2-7 MAGNIFICATION FACTOR AND FORCE TRANSMISSIBILITY AS A FUNCTION OF FREQUENCY RATIO <\/td>\n<\/tr>\n
51<\/td>\n2.5 VIBRATION ISOLATION: TWODEGREE- OF-FREEDOM SYSTEMS
FIGURE 2-8 SCHEMATIC OF TWO-DEGREE-OFFREEDOM VIBRATION MODEL <\/td>\n<\/tr>\n
52<\/td>\n2.6 VIBRATION ISOLATORS
FIGURE 2-9 TYPICAL TWO-DEGREE-OF-FREEDOM VIBRATION RESPONSE OF MECHANICAL SYSTEM ON A FLEXIBLE FLOOR <\/td>\n<\/tr>\n
53<\/td>\nFIGURE 2-10 OPEN EXPOSED SPRING MOUNT
FIGURE 2-11 RESTRAINED SPRING MOUNT
FIGURE 2-12 SPRING HANGER <\/td>\n<\/tr>\n
54<\/td>\nFIGURE 2-13 NEOPRENE MOUNT
FIGURE 2-14 NEOPRENE PAD
FIGURE 2-15 PNEUMATIC VIBRATION ISOLATOR <\/td>\n<\/tr>\n
55<\/td>\n2.7 STRUCTURAL ISOLATION BASES
FIGURE 2-16 GLASS FIBER PAD
FIGURE 2-17 STRUCTURAL BASE
FIGURE 2-18 STEEL SADDLES <\/td>\n<\/tr>\n
56<\/td>\n2.8 CURB BASES
2.9 FLEXIBLE CONNECTIONS
FIGURE 2-19 CONCRETE-STEEL FORM BASE
FIGURE 2-20 CURB BASE
FIGURE 2-21 SPRING THRUST RESTRAINT <\/td>\n<\/tr>\n
57<\/td>\nFIGURE 2-22 SPRING HANGERS USED TO SUPPORT DUCTS
FIGURE 2-23 BUTYL FLEXIBLE HOSES
FIGURE 2-24 BRAIDED STAINLESS STEEL HOSES <\/td>\n<\/tr>\n
58<\/td>\nFIGURE 2-25 RUBBER EXPANSION JOINT
FIGURE 2-26 PIPE VIBRATION ISOLATION
FIGURE 2-27 SPRING HANGERS USED TO SUPPORT PIPES
FIGURE 2-28 RISER VIBRATION ISOLATION SYSTEM
FIGURE 2-29 RISER VIBRATION ISOLATION SYSTEM <\/td>\n<\/tr>\n
59<\/td>\n2.10 FLOATING FLOORS
2.11 FLOOR CONSTRUCTIONS USED TO SUPPORT MECHANICAL EQUIPMENT
FIGURE 2-30 FLOATING CONCRETE FLOORS
FIGURE 2-31 JACK-UP FLOATING FLOOR
FIGURE 2-32 WOODEN FLOATING FLOOR <\/td>\n<\/tr>\n
60<\/td>\n2.12 EQUIPMENT VIBRATION ISOLATION REQUIREMENTS
TABLE 2-2 LIGHTWEIGHT FLOOR CONSTRUCTIONS <\/td>\n<\/tr>\n
61<\/td>\n2.13 VIBRATION ISOLATION SYSTEMS
2.14 VIBRATION ISOLATOR SELECTION
TABLE 2-3 EQUIPMENT THAT REQUIRES VIBRATION ISOLATION <\/td>\n<\/tr>\n
62<\/td>\nTABLE 2-4 VIBRATION ISOLATOR SELECTION GUIDE <\/td>\n<\/tr>\n
64<\/td>\n2.15 INVESTIGATION OF VIBRATION PROBLEMS <\/td>\n<\/tr>\n
65<\/td>\nTABLE 2-5 POTENTIAL CAUSES OF MACHINE-RELATED VIBRATION PROBLEMS <\/td>\n<\/tr>\n
66<\/td>\n2.16 CAUSES OF STRUCTURE-BORNE VIBRATION PROBLEMS <\/td>\n<\/tr>\n
71<\/td>\nCHAPTER 3 ACOUSTICAL DESIGN OF MECHANICAL SYSTEMS
3.1 SOUND LEVELS
3.2 SYSTEM DESIGN GUIDELINES
FIGURE 3-1 ILLUSTRATION OF WELLBALANCED HVAC SOUND SPECTRUM FOR OCCUPIED SPACES
FIGURE 3-2 FREQUENCY RANGES OF THE MOST LIKELY SOURCES OF ACOUSTICAL COMPLAINTS <\/td>\n<\/tr>\n
72<\/td>\nFIGURE 3-3 FREQUENCIES AT WHICH DIFFERENT TYPES OF MECHANICAL EQUIPMENT GENERALLY CONTROL SOUND SPECTRA <\/td>\n<\/tr>\n
73<\/td>\nTABLE 3-1 SOUND SOURCES, TRANSMISSION PATHS, AND RECOMMENDED NOISE REDUCTION METHODS <\/td>\n<\/tr>\n
74<\/td>\n3.3 SOUND PATH DESIGN PROCEDURES
3.4 EQUIPMENT SOUND DATA <\/td>\n<\/tr>\n
75<\/td>\n3.5 FANS
FIGURE 3.4 SUGGESTED SELECTION OF CALCULATED FAN POINT OF OPERATION <\/td>\n<\/tr>\n
76<\/td>\n3.6 VARIABLE-AIR-VOLUME (VAV) SYSTEMS <\/td>\n<\/tr>\n
77<\/td>\nFIGURE 3-5 BASIS FOR FAN SELECTION IN VAV SYSTEM <\/td>\n<\/tr>\n
78<\/td>\n3.7 ROOFTOP CURB-MOUNTED AIR HANDLERS <\/td>\n<\/tr>\n
79<\/td>\nFIGURE 3-6 SOUND PATHS FOR TYPICAL ROOFTOP INSTALLATIONS <\/td>\n<\/tr>\n
80<\/td>\n3.8 AIRFLOW GENERATED DUCT RUMBLE
FIGURE 3-7 FLOW-GENERATED DUCT RUMBLE
FIGURE 3-8 VARIOUS OUTLET CONFIGURATIONS FOR CENTRIFUGAL FANS AND THEIR POSSIBLE RUMBLE CONDITIONS
FIGURE 3-9 DRYWALL LAGGING ON DUCT FOR DUCT RUMBLE <\/td>\n<\/tr>\n
81<\/td>\nFIGURE 3-10 DECOUPLED DRYWALL ENCLOSURE FOR DUCT RUMBLE
FIGURE 3-11 RECTANGULAR DUCT WITH EXTERNAL LAGGING
FIGURE 3-12 ROUND DUCT FOR CONTROLLING DUCT RUMBLE <\/td>\n<\/tr>\n
82<\/td>\nTABLE 3-2 (I-P) MAXIMUM RECOMMENDED DUCT AIRFLOW VELOCITIES NECESSARY TO ACHIEVE SPECIFIED ACOUSTIC DESIGN CRITERIA
TABLE 3-2 (SI) MAXIMUM RECOMMENDED DUCT AIRFLOW VELOCITIES NECESSARY TO ACHIEVE SPECIFIED ACOUSTIC DESIGN CRITERIA
FIGURE 3-13 RECOMMENDATIONS FOR MINIMIZING AIRFLOW GENERATED NOISE IN DUCT TRANSITIONS AND OFFSETS <\/td>\n<\/tr>\n
83<\/td>\n3.9 AERODYNAMICALLY GENERATED SOUND IN DUCTS
TABLE 3-3 (I-P) MAXIMUM RECOMMENDED \u00c3\u00acFREE\u00c3\u00ae SUPPLY OUTLET AND RETURN AIR OPENING VELOCITIES NECESSARY TO ACHIEVE SPECIFIED ACOUSTIC DESIGN CRITERIA
TABLE 3-3 (SI) MAXIMUM RECOMMENDED \u00c3\u00acFREE\u00c3\u00ae SUPPLY OUTLET AND RETURN AIR OPENING VELOCITIES NECESSARY TO ACHIEVE SPECIFIED ACOUSTIC DESIGN CRITERIA
FIGURE 3-14 RECOMMENDATIONS FOR MINIMIZING AIRFLOW GENERATED NOISE IN DUCT <\/td>\n<\/tr>\n
84<\/td>\nFIGURE 3-15 RECOMMENDATIONS FOR MINIMIZING AIRFLOW GENERATED NOISE IN DUCT TEES
FIGURE 3-16 RECOMMENDATIONS FOR MINIMIZING AIRFLOW GENERATED NOISE IN DUCT ELBOWS <\/td>\n<\/tr>\n
85<\/td>\nFIGURE 3-17 PROPER AND IMPROPER AIRFLOW CONDITIONS TO AN AIR TERMINAL OUTLET
FIGURE 3-18 EFFECT OF PROPER AND IMPROPER ALIGNMENT OF FLEXIBLE DUCT CONNECTOR <\/td>\n<\/tr>\n
89<\/td>\nCHAPTER 4 MECHANICAL EQUIPMENT SOUND
4.1 INTRODUCTION
4.2 FANS
TABLE 4-1 SPECIFIC SOUND POWER LEVELS, KW (DB) FOR FAN TOTAL SOUND POWER <\/td>\n<\/tr>\n
90<\/td>\nTABLE 4-2 BLADE FREQUENCY INCREMENTS (BFI)
TABLE 4-3 CORRECTION FACTOR, C, FOR OFF-PEAK OPERATION
EXAMPLE 4-1 <\/td>\n<\/tr>\n
91<\/td>\n4.3 REFRIGERATION EQUIPMENT
TABLE 4-4 CORRECTION VALUES FOR OBTAINING CHILLER OCTAVE BAND SOUND PRESSURE LEVELS
TABLE 4-5 OCTAVE BAND SOUND PRESSURE LEVELS FOR ABSORPTION MACHINES <\/td>\n<\/tr>\n
92<\/td>\n4.4 BOILERS AND STEAM EQUIPMENT
4.5 COOLING TOWERS
TABLE 4-6 OCTAVE BAND SOUND PRESSURE LEVELS FOR BOILERS AND STEAM EQUIPMENT
TABLE 4-7 FREQUENCY CORRECTION VALUES FOR COOLING TOWERS
EXAMPLE 4-2 <\/td>\n<\/tr>\n
93<\/td>\nTABLE 4-8 CORRECTIONS TO AVERAGE LP VALUES FOR DIRECTION EFFECTS OF COOLING TOWERS
FIGURE 4-1 COOLING TOWERS <\/td>\n<\/tr>\n
94<\/td>\n4.6 RECIPROCATING ENGINES
TABLE 4-9 APPROXIMATE CLOSE-IN LP NEAR THE INTAKE AND DISCHARGE OPENINGS OF COOLING TOWERS
EXAMPLE 4-3 <\/td>\n<\/tr>\n
95<\/td>\nTABLE 4-10 CORRECTION TERMS FOR EQUATION 4-10
TABLE 4-11 CORRECTION TERMS FOR LW CALCULATIONS ASSOCIATED WITH RECIPROCATING ENGINES
EXAMPLE 4-4 <\/td>\n<\/tr>\n
96<\/td>\n4.7 GAS TURBINE ENGINES <\/td>\n<\/tr>\n
97<\/td>\nTABLE 4-12 CORRECTION TERMS FOR LW CALCULATIONS ASSOCIATED WITH GAS TURBINES
EXAMPLE 4-5 <\/td>\n<\/tr>\n
98<\/td>\n4.8 ELECTRIC GENERATORS
4.9 ELECTRIC MOTORS
TABLE 4-13 CORRECTION TERMS ASSOCIATED WITH ELECTRIC GENERATORS
EXAMPLE 4-6 <\/td>\n<\/tr>\n
99<\/td>\n4.10 PUMPS
TABLE 4-14 CORRECTION TERMS ASSOCIATED WITH ELECTRIC MOTORS
EXAMPLE 4-7 <\/td>\n<\/tr>\n
100<\/td>\n4.11 AIR COMPRESSORS
4.12 ELECTRICAL TRANSFORMERS
TABLE 4-15 CORRECTION TERMS ASSOCIATED WITH PUMPS
TABLE 4-16 OCTAVE BAND SOUND PRESSURE LEVELS FOR AIR COMPRESSORS
EXAMPLE 4-8 <\/td>\n<\/tr>\n
101<\/td>\nTABLE 4-17 CORRECTION TERMS ASSOCIATED WITH ELECTRICAL TRANSFORMERS
EXAMPLE 4-9 <\/td>\n<\/tr>\n
105<\/td>\nCHAPTER 5 SOUND GENERATION AND ATTENUATION ASSOCIATED WITH DUCTS AND DUCT FITTINGS
5.1 INTRODUCTION
5.2 REGENERATED SOUND POWER ASSOCIATED WITH DUCT FITTINGS
FIGURE 5-1 DAMPER <\/td>\n<\/tr>\n
106<\/td>\nFIGURE 5-2 CHARACTERISTIC SPECTRUM, KD, FOR DAMPERS
EXAMPLE 5-1 <\/td>\n<\/tr>\n
107<\/td>\nFIGURE 5-3 90-DEGREE ELBOW FITTED WITH TURNING VANES
FIGURE 5-4 CHARACTERISTIC SPECTRUM, KT, FOR ELBOWS FITTED WITH TURNING VANES
EXAMPLE 5-2 <\/td>\n<\/tr>\n
108<\/td>\nFIGURE 5-5 ELBOWS, JUNCTIONS, AND BRANCH TAKEOFFS <\/td>\n<\/tr>\n
109<\/td>\nFIGURE 5-6 CORRECTION FACTORS FOR CORNER ROUNDING AND FOR UPSTREAM TURBULENCE
FIGURE 5-7 CHARACTERISTIC SPECTRUM, KJ, FOR TURNS AND JUNCTIONS <\/td>\n<\/tr>\n
110<\/td>\nEXAMPLE 5-3 (X-Junction) <\/td>\n<\/tr>\n
111<\/td>\nEXAMPLE 5-4 (T-Junction)
EXAMPLE 5-5 (90-degree Elbow without Turning Vanes) <\/td>\n<\/tr>\n
112<\/td>\nEXAMPLE 5-6 (90-degree Branch Takeoff) <\/td>\n<\/tr>\n
113<\/td>\nFIGURE 5-8 GENERALIZED OCTAVE BAND SPECTRUM SHAPE ASSOCIATED WITH DIFFUSER NOISE <\/td>\n<\/tr>\n
115<\/td>\n5.3 SOUND ATTENUATION ASSOCIATED WITH DUCT ELEMENTS
FIGURE 5-9 SCHEMATIC OF A PLENUM CHAMBER
EXAMPLE 5-7 <\/td>\n<\/tr>\n
116<\/td>\nTABLE 5-1 ABSORPTION COEFFICIENTS FOR SELECTED PLENUM MATERIALS <\/td>\n<\/tr>\n
117<\/td>\nEXAMPLE 5-8 <\/td>\n<\/tr>\n
118<\/td>\nTABLE 5-2 SOUND ATTENUATION IN UNLINED RECTANGULAR SHEET METAL DUCTS <\/td>\n<\/tr>\n
119<\/td>\nTABLE 5-3 (I-P) SOUND ATTENUATION (DB\/FT) IN UNLINED RECTANGULAR SHEET METAL DUCTS
TABLE 5-3 (SI) SOUND ATTENUATION (DB\/M) IN UNLINED RECTANGULAR SHEET METAL DUCTS
TABLE 5-4 CONSTANTS FOR USE IN EQUATION 5-45
EXAMPLE 5-9 <\/td>\n<\/tr>\n
120<\/td>\nTABLE 5-5 (I-P) INSERTION LOSS FOR RECTANGULAR SHEET METAL DUCTS 1-in. FIBERGLASS LINING
TABLE 5-5 (SI) INSERTION LOSS FOR RECTANGULAR SHEET METAL DUCTS 25-mm FIBERGLASS LINING <\/td>\n<\/tr>\n
121<\/td>\nTABLE 5-6 (I-P) INSERTION LOSS FOR RECTANGULAR SHEET METAL DUCTS 2-in. FIBERGLASS LINING
TABLE 5-6 (SI) INSERTION LOSS FOR RECTANGULAR SHEET METAL DUCTS 51-mm FIBERGLASS LINING <\/td>\n<\/tr>\n
122<\/td>\nTABLE 5-7 (I-P) SOUND ATTENUATION IN STRAIGHT CIRCULAR DUCTS (DB\/FT)
TABLE 5-7 (SI) SOUND ATTENUATION IN STRAIGHT CIRCULAR DUCTS (DB\/M)
EXAMPLE 5-10
EXAMPLE 5-11 <\/td>\n<\/tr>\n
123<\/td>\nTABLE 5-8 COEFFICIENTS FOR EQUATION 5-48
EXAMPLE 5-12 <\/td>\n<\/tr>\n
124<\/td>\nTABLE 5-9 (I-P) INSERTION LOSS FOR DUALWALL CIRCULAR SHEET METAL DUCTS 1-in. FIBERGLASS LINING
TABLE 5-9 (SI) INSERTION LOSS FOR DUALWALL CIRCULAR SHEET METAL DUCTS 25-mm FIBERGLASS LINING
FIGURE 5-10 INSERTION LOSS VALUES FOR UNLINED AND LINED SQUARE ELBOWS WITHOUT TURNING VANES <\/td>\n<\/tr>\n
125<\/td>\nTABLE 5-10 (I-P) INSERTION LOSS FOR DUALWALL CIRCULAR SHEET METAL DUCTS 2-in. FIBERGLASS LINING
TABLE 5-10 (SI) INSERTION LOSS FOR DUALWALL CIRCULAR SHEET METAL DUCTS 51-mm FIBERGLASS LINING
FIGURE 5-11 RECTANGULAR DUCT ELBOWS <\/td>\n<\/tr>\n
126<\/td>\nTABLE 5-11 (I-P) VALUES OF BW (KHz-IN.)
TABLE 5-11 (SI) VALUES OF BW (KHz-MM)
TABLE 5-12 (I-P) INSERTION LOSS VALUES OF UNLINED AND LINED SQUARE ELBOWS WITHOUT TURNING VANES
TABLE 5-12 (SI) INSERTION LOSS VALUES OF UNLINED AND LINED SQUARE ELBOWS WITHOUT TURNING VANES
TABLE 5-13 (I-P) INSERTION LOSS VALUES OF ROUND ELBOWS
TABLE 5-13 (SI) INSERTION LOSS VALUES OF ROUND ELBOWS
TABLE 5-14 (I-P) INSERTION LOSS VALUES OF UNLINED AND LINED SQUARE ELBOWS WITH TURNING VANES
TABLE 5-14 (SI) INSERTION LOSS VALUES OF UNLINED AND LINED SQUARE ELBOWS WITH TURNING VANES
EXAMPLE 5-13
EXAMPLE 5-14 <\/td>\n<\/tr>\n
127<\/td>\nEXAMPLE 5-15 <\/td>\n<\/tr>\n
128<\/td>\nFIGURE 5-12 DISSIPATIVE PASSIVE DUCT SILENCERS <\/td>\n<\/tr>\n
129<\/td>\nFIGURE 5-13 ACTIVE DUCT SILENCER <\/td>\n<\/tr>\n
130<\/td>\nTABLE 5-15 7 FT (2.1 M), RECTANGULAR SILENCER – 20-25 PERCENT OPEN FACE AREA
TABLE 5-16 7 FT (2.1 M), RECTANGULAR SILENCER – 45-50 PERCENT OPEN FACE AREA
FIGURE 5-14 INSERTION LOSS OF ACTIVE AND DISSIPATIVE SILENCERS <\/td>\n<\/tr>\n
131<\/td>\nTABLE 5-17 CIRCULAR SILENCER WITH A CENTER BODY
TABLE 5-18 CIRCULAR SILENCER WITHOUT A CENTER BODY
TABLE 5-19 COEFFICIENTS FOR DETERMINING STATIC PRESSURE DROP ACROSS DUCT SILENCERS <\/td>\n<\/tr>\n
132<\/td>\nTABLE 5-20 COEFFICIENTS FOR SYSTEM COMPONENT EFFECTS ON DUCT SILENCERS
EXAMPLE 5-16 <\/td>\n<\/tr>\n
133<\/td>\nTABLE 5-21 DUCT BRANCH SOUND POWER DIVISION <\/td>\n<\/tr>\n
134<\/td>\nEXAMPLE 5-17 <\/td>\n<\/tr>\n
135<\/td>\nTABLE 5-22 DUCT END REFLECTION LOSS DUCT TERMINATED IN FREE SPACE
TABLE 5-23 DUCT END REFLECTION LOSS DUCT TERMINATED FLUSH WITH A WALL <\/td>\n<\/tr>\n
136<\/td>\n5.4 SOUND POWER BREAKOUT AND BREAKIN IN DUCTS
FIGURE 5-15 BREAKOUT AND BREAKIN OF SOUND IN DUCTS
EXAMPLE 5-18 <\/td>\n<\/tr>\n
137<\/td>\nFIGURE 5-16 TLOUT ASSOCIATED WITH UNLINED AND ACOUSTICALLY LINED RECTANGULAR DUCTS <\/td>\n<\/tr>\n
138<\/td>\nTABLE 5-24 TLOUT VALUES FOR UNLINED RECTANGULAR SHEET METAL DUCTS <\/td>\n<\/tr>\n
139<\/td>\nEXAMPLE 5-19 <\/td>\n<\/tr>\n
140<\/td>\nTABLE 5-25 TLOUT VALUES FOR 1-in.-THICK (25 mm), FIGERGLASS-LINED, RECTANGULAR SHEET METAL DUCTS <\/td>\n<\/tr>\n
141<\/td>\nFIGURE 5-17 TLOUT ASSOCIATED WITH UNLINED AND ACOUSTICALLY LINED SPIRALWOUND CIRCULAR DUCTS <\/td>\n<\/tr>\n
143<\/td>\nTABLE 5-26 TLOUT VALUES FOR UNLINED, SPIRAL-WOUND, CIRCULAR SHEET METAL DUCTS <\/td>\n<\/tr>\n
144<\/td>\nTABLE 5-27 TLOUT VALUES FOR 1-in.-THICK (25 mm), FIBERGLASS-LINED, SPIRAL-WOUND, CIRCULAR SHEET METAL DUCTS
EXAMPLE 5-20 <\/td>\n<\/tr>\n
145<\/td>\nFIGURE 5-18 TLOUT ASSOCIATED WITH FOILBACK, FIBERGLASS DUCT BOARD DUCTS <\/td>\n<\/tr>\n
146<\/td>\nTABLE 5-28 TLOUT VALUES FOR 1-in.-THICK (25 mm), 4.4 lb\/ft3 (70.5 kg\/m3) DENSITY, FOIL-BACK, FIBERGLASS DUCT BOARD DUCTS <\/td>\n<\/tr>\n
147<\/td>\nFIGURE 5-19 FLAT OVAL DUCT
EXAMPLE 5-21 <\/td>\n<\/tr>\n
148<\/td>\nTABLE 5-29 TLOUT VS. FREQUENCY FOR FLAT OVAL DUCTS
TABLE 5-30 TLIN VS. FREQUENCY FOR FLAT OVAL DUCTS <\/td>\n<\/tr>\n
149<\/td>\nEXAMPLE 5-19 <\/td>\n<\/tr>\n
150<\/td>\n5.5 INSERTION LOSS OF EXTERNAL LAGGING ON RECTANGULAR DUCTS
FIGURE 5-20 EXTERNAL DUCT LAGGING ON RECTANGULAR DUCTS
FIGURE 5-21 INSERTION LOSS ASSOCIATAED WITH RECTANGULAR DUCT LAGGING <\/td>\n<\/tr>\n
151<\/td>\nEXAMPLE 5-20 <\/td>\n<\/tr>\n
155<\/td>\nCHAPTER 6 SOUND TRANSMISSION IN INDOOR AND OUTDOOR SPACES
6.1 INTRODUCTION
6.2 SOUND TRANSMISSION THROUGH CEILING SYSTEMS
TABLE 6-1 (I-P) TRANSMISSION LOSS VALUES FOR CEILING MATERIALS
TABLE 6-1 (SI) TRANSMISSION LOSS VALUES FOR CEILING MATERIALS
EXAMPLE 6-1 <\/td>\n<\/tr>\n
156<\/td>\nTABLE 6-2 FOR DIFFERENT TYPES OF CEILING CONFIGURATIONS
TABLE 6-3 TRANSMISSION LOSS VALUES OF TYPICAL INTEGRATED CEILING SYSTEMS
Table 6-4 (I-P) CEILING\/PLENUM\/ROOM SOUND ATTENUATION FOR GENERIC SUSPENDED CEILING SYSTEMS*
Table 6-4 (SI) CEILING\/PLENUM\/ROOM SOUND ATTENUATION FOR GENERIC SUSPENDED CEILING SYSTEMS* <\/td>\n<\/tr>\n
157<\/td>\n6.3 RECEIVER ROOM SOUND CORRECTIONS
TABLE 6-5 AVERAGE SOUND ABSORPTION COEFFICIENT, , FOR TYPICAL ROOM SURFACES <\/td>\n<\/tr>\n
159<\/td>\nTABLE 6-6 ENERGY ATTENUATION CONSTANT, 4m
EXAMPLE 6-2 <\/td>\n<\/tr>\n
160<\/td>\n6.4 SOUND TRANSMISSION THROUGH MECHANICAL EQUIPMENT ROOM WALLS, FLOOR, OR CEILING <\/td>\n<\/tr>\n
161<\/td>\nTABLE 6-7 SOUND ABSORPTION COEFFICIENTS FOR VARIOUS CONSTRUCTION MATERIALS <\/td>\n<\/tr>\n
162<\/td>\nTABLE 6-8 TRANSMISSION LOSS VALUES OF DRYWALL CONFIGURATIONS
TABLE 6-9 TRANSMISSION LOSS VALUES OF MASONRY\/FLOOR\/CEILING CONFIGURATIONS <\/td>\n<\/tr>\n
163<\/td>\nTABLE 6-10 TRANSMISSION LOSS VALUES OF PAINTED MASONRY BLOCK WALLS AND PAINTED BLOCK WALLS WITH RESILIENTLY MOUNTED GYPSUM WALLBOARD
TABLE 6-11 CORRECTION FACTORS FOR THE QUALITY OF CONSTRUCTION
EXAMPLE 6-3 <\/td>\n<\/tr>\n
164<\/td>\n6.5 SOUND TRANSMISSION IN OUTDOOR ENVIRONMENTS
EXAMPLE 6-4 <\/td>\n<\/tr>\n
165<\/td>\nFIGURE 6-1 SOUND SOURCE NEAR A REFLECTING SURFACE
FIGURE 6-2 CORRECTION FACTOR, DL, ASSOCIATED WITH A VERTICAL REFLECTING SURFACE <\/td>\n<\/tr>\n
166<\/td>\nFIGURE 6-3 RIGID FINITE BARRIER
FIGURE 6-4 EXCESS ATTENUATION OF SOUND ASSOCIATED WITH A FINITE RIGID BARRIER <\/td>\n<\/tr>\n
167<\/td>\nEXAMPLE 6-5 <\/td>\n<\/tr>\n
171<\/td>\nCHAPTER 7 HVAC SYSTEM EXAMPLE
7.1 INTRODUCTION
7.2 EXAMPLE
FIGURE 7-1 SOUND PATHS FOR THE ROOF TOP UNIT <\/td>\n<\/tr>\n
172<\/td>\nFIGURE 7-2 SOUND PATHS 1 AND 2 IN THE SUPPLY AIR SIDE OF THE ROOF TOP UNIT <\/td>\n<\/tr>\n
173<\/td>\nTABLE 7-1 SUPPLY AIR SOUND PATH 1 <\/td>\n<\/tr>\n
174<\/td>\nTABLE 7-2 SUPPLY AIR SOUND PATH 2
FIGURE 7-3 SOUND PATH 3 IN THE RETURN AIR SIDE OF THE ROOF TOP UNIT <\/td>\n<\/tr>\n
175<\/td>\nTABLE 7-3 RETURN AIR SOUND PATH 3
TABLE 7-4 TOTAL SOUND PRESSURE LEVELS – ALL PATHS <\/td>\n<\/tr>\n
179<\/td>\nCHAPTER 8 MECHANICAL EQUIPMENT SOUND AND VIBRATION SPECIFICATIONS AND INSPECTIONS
8.1 INTRODUCTION
8.2 MECHANICAL EQUIPMENT SOUND AND VIBRATION SPECIFICATIONS <\/td>\n<\/tr>\n
180<\/td>\n8.3 MECHANICAL EQUIPMENT SOUND AND VIBRATION ISOLATION INSPECTIONS <\/td>\n<\/tr>\n
185<\/td>\nCHAPTER 9 SOUND INSTRUMENTATION AND MEASUREMENTS
9.1 INTRODUCTION
9.2 SOUND MEASUREMENT INSTRUMENTATION
FIGURE 9-1 SCHEMATIC DIAGRAM OF SOUND LEVEL METER <\/td>\n<\/tr>\n
186<\/td>\nFIGURE 9-2 SECTIONAL VIEW OF A CONDENSER MICROPHONE
FIGURE 9-3 RECOMMENDED MICROPHONES AND MICROPHONE ORIENTATIONS FOR FREE FIELD AND DIFFUSE FIELD SOUND MEASUREMENTS <\/td>\n<\/tr>\n
188<\/td>\n9.3 INDOOR SOUND MEASUREMENTS <\/td>\n<\/tr>\n
190<\/td>\nFIGURE 9-4 POSITION OF SOUND LEVEL METER FOR MEASURING SOUND LEVELS <\/td>\n<\/tr>\n
191<\/td>\n9.4 OUTDOOR SOUND MEASUREMENTS <\/td>\n<\/tr>\n
195<\/td>\nCHAPTER 10 VIBRATION INSTRUMENTATION AND MEASUREMENTS
10.1 INTRODUCTION
10.2 VIBRATION MEASUREMENT INSTRUMENTATION <\/td>\n<\/tr>\n
198<\/td>\nFIGURE 10-1 FREQUENCY RESPONSE OF A REPRESENTATIVE STUD-MOUNTED ACCELEROMETER WITH OIL FILM RELATIVE TO THE ABSOLUTE ACCELERATION OF THE STRUCTURE AT ITS ATTACHMENT
FIGURE 10-2 FREQUENCY RESPONSE OF A REPRESENTATIVE CEMENT-MOUNTED ACCELEROMETER RELATIVE TO THE ABSOLUTE ACCELERATION OF THE STRUCTURE AT ITS ATTACHMENT
FIGURE 10-3 FREQUENCY RESPONSE OF A REPRESENTATIVE ACCELEROMETER MOUNTED BY DOUBLE-SIDED ADHESIVE TAPE RELATIVE TO THE ABSOLUTE ACCELERATION OF THE STRUCTURE AT ITS ATTACHMENT
FIGURE 10-4 FREQUENCY RESPONSE OF A REPRESENTATIVE ACCELEROMETER MOUNTED WITH A THIN LAYER OF BEESWAX RELATIVE TO THE ABSOLUTE ACCELERATION OF THE STRUCTURE AT ITS ATTACHMENT
FIGURE 10-5 FREQUENCY RESPONSE OF A REPRESENTATIVE MAGNETICALLY MOUNTED ACCELEROMETER RELATIVE TO THE ABSOLUTE ACCELERATION OF THE STRUCTURE AT ITS ATTACHMENT
FIGURE 10-6 FREQUENCY RESPONSE OF A REPRESENTATIVE ACCELEROMETER ATTACHED TO A HAND-HELD PROBE RELATIVE TO THE ABSOLUTE ACCELERATION OF THE STRUCTURE AT THE CONTACT POINT <\/td>\n<\/tr>\n
199<\/td>\n10.3 INDOOR VIBRATION MEASUREMENTS
10.4 LOCATIONS FOR THE VIBRATION MEASUREMENTS
FIGURE 10-7 POSITIONS AND DIRECTIONS OF VIBRATION MEASUREMENT ON MOTOR AND SHAFT BEARINGS <\/td>\n<\/tr>\n
200<\/td>\n10.5 VIBRATION MEASUREMENTS
10.6 ASSESSMENT OF INDOOR VIBRATION MEASUREMENTS
FIGURE 10-8 LOCATIONS OF VIBRATION MEASUREMENTS ON STRUCTURAL MACHINE BASES
FIGURE 10-9 LOCATIONS OF VIBRATION MEASUREMENTS ON INERTIA MACHINE BASES <\/td>\n<\/tr>\n
201<\/td>\n10.7 REPORT <\/td>\n<\/tr>\n
205<\/td>\nREFERENCES <\/td>\n<\/tr>\n
211<\/td>\nGLOSSARY <\/td>\n<\/tr>\n
217<\/td>\nINDEX <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

HVAC Sound and Vibration Manual, 1st Edition<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
SMACNA<\/b><\/a><\/td>\n2004<\/td>\n222<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":28906,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2703],"product_tag":[],"class_list":{"0":"post-28905","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-smacna","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/28905","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/28906"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=28905"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=28905"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=28905"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}