Acoustics Training

Lesson 1 • Key Acoustic Quantities

Introduces sound pressure, intensity, and power as measurable quantities. Connects physical definitions to practical measurement contexts.

Lesson 2 • Frequency Analysis Basics

Introduces octave and third-octave band analysis as standard tools. Prepares students for spectral measurement and noise assessment tasks.

Lesson 3 • The Decibel Scale

Explains logarithmic scaling and reference levels used in acoustics. Enables accurate interpretation of dB values in professional settings.

Lesson 4 • Nature of Sound Waves

Covers compression, rarefaction, and longitudinal wave propagation in air. Establishes the physical basis for all subsequent acoustic analysis.

Lesson 1 • Free-Field Propagation

Covers inverse-square law and geometric spreading in open environments. Provides the baseline model for outdoor and anechoic conditions.

Lesson 2 • Atmospheric and Ground Effects

Addresses temperature gradients, wind, and ground reflection in outdoor propagation. Enables realistic outdoor noise prediction.

Lesson 3 • Reflection, Absorption, and Transmission

Examines what happens when sound strikes a boundary. Connects material properties to energy partitioning at surfaces.

Lesson 4 • Diffraction and Scattering

Explains how sound bends around obstacles and scatters from irregular surfaces. Relevant to barrier design and complex geometry analysis.

Lesson 1 • Sound Distribution in Rooms

Examines direct sound, early reflections, and diffuse field contributions. Connects room geometry to listener experience.

Lesson 2 • Acoustic Treatment Strategies

Surveys absorbers, diffusers, and reflectors as room treatment tools. Links treatment selection to target acoustic performance metrics.

Lesson 3 • Room Modes and Resonance

Introduces standing waves and modal frequencies in rectangular rooms. Explains low-frequency colouration and uneven bass distribution.

Lesson 4 • Reverberation and Decay

Covers reverberation time theory and its dependence on room volume and absorption. Central to evaluating speech intelligibility and music clarity.

Lesson 1 • Measurement Descriptors and Metrics

Defines Leq, Lmax, Lpeak, and percentile levels used in noise assessment. Connects descriptor choice to regulatory and health-based criteria.

Lesson 2 • Sound Level Meters and Microphones

Covers meter classes, microphone types, and frequency-weighting networks. Establishes correct equipment selection for different measurement tasks.

Lesson 3 • Calibration and Uncertainty

Explains field calibration, reference standards, and measurement uncertainty estimation. Ensures data quality and traceability to international standards.

Lesson 4 • Measurement Survey Planning

Addresses microphone positioning, background noise correction, and survey duration. Produces representative and defensible measurement datasets.

Lesson 1 • Hierarchy of Noise Controls

Establishes elimination, substitution, engineering, and administrative controls in order of effectiveness. Frames all subsequent noise control decision-making.

Lesson 2 • Source Reduction Techniques

Covers vibration isolation, damping, and operational modifications to reduce noise at origin. Directly addresses the most effective control tier.

Lesson 3 • Silencers and Mufflers

Covers reactive and dissipative silencer types for duct and exhaust systems. Enables selection and sizing of silencers for target attenuation.

Lesson 4 • Receiver-Side Controls

Addresses acoustic refuges, hearing protection devices, and administrative exposure limits. Completes the control hierarchy at the worker or community level.

Lesson 1 • Wall and Floor-Ceiling Assemblies

Examines single-leaf, double-leaf, and floating floor constructions. Connects assembly details to achievable isolation performance.

Lesson 2 • Sound Transmission Loss Fundamentals

Defines TL, STC, and Rw ratings for partitions. Establishes the physical basis for selecting walls, floors, and ceilings.

Lesson 3 • Acoustic Performance Criteria

Presents occupancy-based targets for offices, dwellings, and healthcare spaces. Enables specification of constructions against functional requirements.

Lesson 4 • Flanking Transmission Paths

Identifies structural and airborne flanking routes that bypass primary partitions. Critical for achieving rated isolation in real buildings.

Lesson 1 • Noise Action Planning

Explains strategic noise mapping, action plan development, and stakeholder engagement. Prepares students for long-term community noise management roles.

Lesson 2 • Noise Prediction and Modelling

Introduces empirical and numerical methods for outdoor noise prediction. Enables generation of noise contour maps for planning purposes.

Lesson 3 • Noise Impact Assessment

Covers baseline surveys, impact significance criteria, and receptor identification. Produces structured assessments for planning and permitting processes.

Lesson 4 • Community Noise Sources and Descriptors

Characterises road, rail, aircraft, and industrial noise using standard descriptors. Establishes the source inventory needed for impact assessment.

Lesson 1 • Audiometric Testing and Surveillance

Covers baseline and periodic audiometry, threshold shift criteria, and referral protocols. Detects early hearing loss and triggers timely intervention.

Lesson 2 • Hearing Conservation Programme Management

Integrates exposure assessment, controls, HPDs, and audiometry into a managed programme. Enables programme evaluation and continuous improvement.

Lesson 3 • Noise-Induced Hearing Loss

Explains the pathophysiology of noise-induced hearing loss and dose-response relationships. Motivates the urgency of preventive controls.

Lesson 4 • Hearing Protection Programme Design

Addresses selection, fitting, training, and maintenance of hearing protection devices. Ensures effective real-world attenuation for exposed workers.