Hearing Aid Technician Training

Lesson 1 • Physics of Sound and Hearing

Explains frequency, amplitude, decibels, and sound wave behaviour. Connects acoustic principles to how hearing aids capture and process sound.

Lesson 2 • Types and Causes of Hearing Loss

Differentiates conductive, sensorineural, and mixed hearing loss by origin and audiological profile. Prepares technicians to match device solutions to loss type.

Lesson 3 • Anatomy of the Human Ear

Covers outer, middle, and inner ear structures and their roles in sound transmission. Establishes anatomical vocabulary used throughout the entire course.

Lesson 1 • Digital Signal Processing Fundamentals

Explains analogue-to-digital conversion, compression, and noise reduction algorithms. Provides the technical basis for programming decisions covered in later chapters.

Lesson 2 • Wireless Connectivity and Accessories

Covers Bluetooth, proprietary wireless protocols, and remote microphone accessories. Prepares technicians to configure and troubleshoot connected hearing systems.

Lesson 3 • Hearing Aid Selection Criteria

Applies audiogram data and lifestyle factors to device selection decisions. Bridges product knowledge to client-centred fitting practice.

Lesson 4 • Hearing Aid Styles and Form Factors

Surveys behind-the-ear, in-the-ear, receiver-in-canal, and implantable styles. Connects physical form to candidacy criteria established in Chapter 1.

Lesson 1 • Ear Impression Materials and Techniques

Covers silicone and foam impression materials, mixing ratios, and injection methods. Accurate impressions are the foundation of well-fitting earmolds and custom shells.

Lesson 2 • Earmold Design and Venting Options

Explains full-shell, skeleton, canal, and open earmold designs and their acoustic effects. Vent selection directly impacts gain, occlusion, and feedback.

Lesson 3 • Custom Shell Fabrication Process

Walks through 3D scanning, UV curing, and traditional acrylic shell production methods. Technicians learn quality checkpoints at each fabrication stage.

Lesson 1 • Functional Gain and Sound Field Testing

Uses aided and unaided sound field thresholds to estimate functional benefit when probe-tube equipment is unavailable. Provides an alternative verification method for field settings.

Lesson 2 • Fitting Software and Programming

Explains manufacturer fitting software navigation, audiogram entry, and programme creation. Software proficiency is required for all subsequent programming and fine-tuning tasks.

Lesson 3 • Real-Ear Measurement Procedures

Covers probe tube placement, REUR, REAG, REIG, and REAR measurements. Real-ear data confirms that programmed gain matches prescriptive targets in the client's ear.

Lesson 4 • Prescriptive Fitting Targets

Introduces NAL-NL2, DSL, and proprietary prescriptive methods and their underlying rationale. Targets guide initial programming before real-ear verification.

Lesson 1 • Gain and Compression Adjustments

Teaches channel-specific gain changes, compression ratio, and knee-point modifications. These adjustments resolve loudness complaints and improve soft-sound audibility.

Lesson 2 • Troubleshooting Programming Issues

Diagnoses and resolves common software errors, connectivity failures, and unexpected output behaviours. Systematic troubleshooting reduces chair time and client frustration.

Lesson 3 • Directional Microphone Configuration

Programmes fixed, adaptive, and binaural beamforming directional modes for different environments. Directional settings improve signal-to-noise ratio in challenging listening situations.

Lesson 4 • Environment-Specific Programme Creation

Builds dedicated programmes for music, telephone, restaurant, and outdoor use. Multiple programmes address the varied acoustic demands clients encounter daily.

Lesson 1 • Tubing and Receiver Replacement

Demonstrates standard and thin-tube replacement, receiver wire swapping, and dome selection. Tubing and receiver integrity directly affect sound quality and feedback.

Lesson 2 • Electroacoustic Analysis and Testing

Uses a hearing aid test box to measure OSPL90, full-on gain, frequency response, and distortion. Test box data confirms device performance meets manufacturer specifications.

Lesson 3 • Routine Cleaning and Care Procedures

Covers wax filter replacement, microphone port cleaning, and moisture removal protocols. Daily and weekly care routines prevent the majority of device failures.

Lesson 4 • Bench Repair and Component Replacement

Teaches microphone, receiver, and volume control replacement using bench tools. Bench repair skills reduce manufacturer return rates and turnaround time.

Lesson 1 • Setting Realistic Expectations

Explains acclimatisation periods, background noise limitations, and bilateral fitting benefits. Accurate expectations reduce dissatisfaction and early device abandonment.

Lesson 2 • Aural Rehabilitation Basics

Introduces listening strategies, communication tactics, and group rehabilitation programme referrals. Aural rehabilitation extends benefit beyond what amplification alone provides.

Lesson 3 • Hearing Aid Orientation and Instruction

Guides clients through insertion, removal, battery change, and cleaning of their specific device. Hands-on orientation reduces early return visits and builds client confidence.

Lesson 1 • Regulatory and Warranty Compliance

Explains device registration, warranty claim procedures, and consumer protection obligations. Compliance with regulatory requirements prevents legal and financial penalties.

Lesson 2 • Continuing Education and Certification

Outlines certification pathways, continuing education requirements, and professional association membership. Ongoing education maintains competency and supports career advancement.

Lesson 3 • Scope of Practice and Professional Ethics

Defines the technician's authorised tasks versus audiologist-only procedures and ethical boundaries. Clear scope awareness prevents unauthorised practice and liability.

Lesson 4 • Infection Control in the Clinic

Applies hand hygiene, surface disinfection, and instrument sterilisation protocols to hearing care settings. Infection control protects clients and staff from cross-contamination.