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Course Info

  • FUNDAMENTALS OF ACOUSTICS

FUNDAMENTALS OF ACOUSTICS

About this Course

Sound as a science may be defined as the generation, transmission, manipulation and reception of energy as vibrational waves in matter that possess mass and elasticity. Sound may be perceived in many ways, from the unwanted construction noise to pleasant music. Without control, sound may pollute the environment, cause hearing deficiency and create displeasure and stress to public health. On the other hand, effective sound control strategies based on technology and space design can greatly improve the quality of life at work, in performance spaces and at home. Noise control technology aimed at reducing environmental noise encompasses application of the science of sound, mathematical formulations related to the transmission of sound waves, the resonance aspects in sound absorption systems and basic signal processing theory besides legal, environmental and health aspects. The need for noise control engineering in private and public venues has been rising in Malaysia, where there is an evident lack of number of experts or technicians in the field. Students may further their study in Acoustical Engineering or Vibro-acoustics Control Engineering in various disciplines such as Architectural, Environmental or Underwater Acoustics at the Post-Graduate Level to be an expert or consultant.

Course Syllabus

Syllabus Info
Introduction to Sound and Waves
1.1 Definition of Sound
1.2 Sound Pressure Level and The Decibel Scale
1.3 Characteristics of Sound Waves

Sound Propagation Phenomenon
2.1 Reflection and Standing Waves
2.2 Refraction and Diffraction
2.3 Noise sources: Machinery, Automotive, Aircraft and Built Environment

Measurement and Processing of Sound Signals
3.1 Instrumentation – Sound Level Meter (SLM)
3.2 Weighting
3.3 Equal Loudness Contour
3.4 Temporal and Spectral Analysis of Sound Signals
3.5 Sound Intensity and Sensors

Noise Control Engineering
4.1 Sound Absorption Materials
4.2 Room Reverberation and Dimensions
4.3 Design of Sound Insulators
4.4 Quarter- and Half-Wavelength Resonators

Current Technologies
5.1 Active and Passive Sound Absorption Strategies
5.2 Noise Cancelation Techniques
5.3 Adaptive Sound Barriers – Types and Design Parameters

Legislative Relevance and Noise Limits
6.1 International Standards for Environmental Noise
6.2 Environmental Impact Assessment in Malaysia
6.3 Noise Insulation Ratings and Acoustical Mapping Mini-project

Frequently Asked Questions

Course FAQ
Q1 : Besides MEC521 (Vibrations), what other prerequisites must I possess to handle this course successfully?
A1 : A strong grasp of the science of sound waves, generation and transmission. This subject area is conventionally a chapter in high school Physics.

Q2 : Do I need to have the necessary physical equipment like a sound level meter (SLM) or spectrum analyzer for this course?
A2 : Not necessary. You will be guided by the instructor to install a SLM app on your smartphone that comes with spectral analysis capability.