Building Acoustics and Noise Control
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This course is aimed at anyone considering entering the acoustic consultancy profession including university students, engineering and architectural professionals looking for a career change or construction industry contractors. It provides the fundamental knowledge to understand the key design aspects of building acoustics and noise control. It is considered to be entry level acoustics knowledge for all engineering students wanting to get a job in the acoustic industry. High school mathematics is preferred but not essential.
To demonstrate the concepts, example spreadsheet calculations and sound demonstrations (called auralisations) are provided. Spreadsheets are also available as separate downloads.
Topics covered include acoustic fundamentals, sound outdoors, room acoustics, sound insulation, impact noise, acoustics for sustainable design.
By the end of this course students with an undergraduate degree in engineering, science or architecture, as well as mature age students with previous work experience from the building and construction industry will have enough background knowledge to qualify for entry level acoustic consultant job positions.
Course content in detail:
1. Acoustic Fundamentals
a. What is sound?
b. Decibel arithmetic
c. Describing sound sources
d. Acoustic properties of materials
e. More detail on sound absorption
2. Sound Propagation Outdoors
a. Describing sound sources
b. 5 factors affecting direct sound levels (in detail)
c. Distance from the source
d. Sound source size
e. Source directivity and location
f. Screening by barriers
g. Calculations of outdoor sound levels
h. Outdoor sound level criteria
3. Room Acoustics
a. Sound propagation in rooms
b. Types of surfaces
c. Reverberation time calculations
d. Reverberant sound level calculations
e. Room acoustic modelling
f. 3D room acoustic modelling software
g. Auralisations
h. Auralisation example (Beijing Watercube)
4. Sound Insulation
a. Sound absorption and sound insulation
b. Airborne and structureborne sound
c. Sound insulation performance parameters
d. Sound Insulation of partitions
e. Sound Insulation of glazing
f. Sound Insulation of composite partitions
g. Sound Insulating constructions
h. Auralisations of sound insulation
5. Impact Noise
a. Sound transmission in buildings
b. Impact noise generation and transmission through structures
c. Impact noise parameters and standards
d. Impact noise measurements
e. Sound insulating floor systems
f. Impact noise reduction
g. Case study – residential apartment
6. Acoustics for Sustainable Design
a. Acoustic considerations for sustainable design (city and building scale)
b. Acoustic comfort in green building rating systems (1hr to end of here)
c. Acoustics for open plan offices
d. Acoustic privacy in meeting rooms and offices
e. Natural ventilation and noise control
f. Dual vented window design
g. Naturally ventilated design of a library
h. Recycled materials with acoustic properties
i. Daylighting and acoustics
I also have a starting course called Acoustics for Beginners if you want to start with the basics of acoustics before progressing to this course.
Feel free to also check out my other course focusing on Heating Ventilation and Airconditioning and Noise Control.
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2What is soundVídeo Aula
Frequency, wavelength, speed of sound, frequency spectra, octave bands, third octave bands, sound pressure level, A-weighting.
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3Decibel ArithmeticVídeo Aula
Adding sound pressure levels on a computer and using the shortcut method.
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4Describing Sound SourcesVídeo Aula
Sound pressure level vs sound power level, 5 factors affecting direct sound pressure levels, omnidirectional (spherical) radiation, directivity index.
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5Acoustic Properties of MaterialsVídeo Aula
Reflectors, absorbers, diffusers, diffusive panel design case study.
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6More Detail on Sound AbsorptionVídeo Aula
Porous dissipative absorption, flexing movements, resonance, characteristics of absorber types, sound absorber examples, sound absorption coefficients of some common materials, atrium acoustic design example auralisation.
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7Sound Propagation and Describing Sound SourcesVídeo Aula
Sound pressure level vs sound power level and calculation of sound pressure level.
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85 Factors Affecting Direct Sound Levels (in detail)Vídeo Aula
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9Distance from the Sound SourceVídeo Aula
Sound decay with distance away for an omnidirectional (spherical) sound source.
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10Sound Source SizeVídeo Aula
Point source, line source and plane source.
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11Source Directivity and LocationVídeo Aula
Directivity index, location of the source, hemispherical radiation, 1/4 sphere radiation, 1/8 sphere radiation.
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12Screening by BarriersVídeo Aula
Source size, path difference, barrier dimensions, 2D example, Excel calculation.
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13Calculations of Outdoor Sound LevelsVídeo Aula
Summary of all the corrections for outdoor sound level calculations and an example Excel calculation.
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14Outdoor Sound Level CriteriaVídeo Aula
dB(A), Lmax, L1, L10, Leq, L90 metrics, outdoor sound level criteria discussion, noise creep, noise burden, example amenity noise criteria.
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15Sound Propagation in RoomsVídeo Aula
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16Types of SurfacesVídeo Aula
Reflective, absorptive and diffusive surfaces, sound absorption coefficients of some internal finishes.
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17Reverberation Time CalculationsVídeo Aula
Reverberance, reverberation time (RT), Sabine's equation, Fitzroy equation, Eyring equation, flutter echoes, example reverberation time calculation, typical RTs of spaces.
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18Placement of Acoustic TreatmentVídeo Aula
Case studies - unamplified music, amplified music, speech auditorium, office boardroom, assembly hall, diffusive panel design for a theatre.
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19Reverberant Sound Level CalculationsVídeo Aula
Reverberant sound level in a space (calculation method), example calculation of reverberant sound level in an indoor swimming centre.
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20Room Acoustic ModellingVídeo Aula
Physical scale modelling, 2D and 3D raytracing using Matlab and AutoCAD.
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213D Room Acoustic Modelling SoftwareVídeo Aula
Overview of room acoustic software, detail in computer modelling, 3D modelling in a railway station.
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22AuralisationsVídeo Aula
Sound propagation in rooms, impulse response, the benefit of auralisations, portable auralisations, auralisations in a controlled environment, soundlab auralisations.
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23Auralisation ExampleVídeo Aula
Demonstration of the speech intelligibility of emergency announcements within an indoor swimming centre.
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24Sound Absorption and Sound InsulationVídeo Aula
The difference between sound absorption and sound insulation, the acoustic considerations due to sound transmission including disturbance, speech privacy and speech intelligibility.
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25Airborne and Structureborne SoundVídeo Aula
The difference between airborne and structureborne sound, demonstration using a music box.
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26Sound Insulation Performance ParametersVídeo Aula
Airborne sound insulation ratings, weighted sound reduction index (Rw), sound transmission class (STC), weighted impact sound pressure level (LnTw), impact isolation class (IIC), limitations of single number ratings, laboratory vs field performance,
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27Sound Insulation of PartitionsVídeo Aula
Sound insulation of a single leaf partition, sound insulation of a double leaf partition.
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28Sound Insulation of GlazingVídeo Aula
Float glass, laminated glass, double glazing units, factors affecting acoustic performance.
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29Sound Insulation of Composite PartitionsVídeo Aula
Calculations of composite transmission loss of partitions, example calculation spreadsheet, the 10% rule of thumb.
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30Sound Insulating ConstructionsVídeo Aula
Wet and dry wall constructions, typical wall and glazing construction details and corresponding acoustic performances (Rw).
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31Auralisations of Sound InsulationVídeo Aula
Auralisations of glazing selection with traffic noise, and acoustic privacy provided by wall partitions in offices.
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32Sound Transmission in BuildingsVídeo Aula
Airborne sound compared to structureborne sound.
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33Impact Noise Generation and Transmission Through StructuresVídeo Aula
Impact noise generation and transmission in buildings, airborne vs structureborne sound demonstration using a music box.
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34Impact Noise Parameters and StandardsVídeo Aula
Impact Isolation Class (IIC), Weighted Impact Sound Pressure Level (LnTw), international standards and criteria.
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35Impact Noise MeasurementsVídeo Aula
Measurement procedure, standard tapping machines, importance of frequency content of impact noise, example measurement review,
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36Sound Insulating Floor SystemsVídeo Aula
Review of sound insulating floor systems, hard and soft floor coverings, impact noise reduction strategies, concrete base constructions, timber floor systems.
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37Impact Noise ReductionVídeo Aula
Brief overview of the top 5 ways of reducing impact noise generation from floor surfaces.
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38Case Study - Residential ApartmentVídeo Aula
Case study of an impact noise assessment and floor design for a residential apartment.
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