Hearing Aid Technology & Fitting Course

Lesson 1 • Anatomy of the Auditory System

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

Lesson 2 • Classification of Hearing Loss

Defines conductive, sensorineural, and mixed loss types by etiology and audiometric pattern. Guides appropriate device and referral decisions.

Lesson 3 • Physics of Sound and Acoustics

Explains frequency, intensity, wavelength, and decibel scales as they apply to hearing. Provides the acoustic vocabulary needed for device selection.

Lesson 1 • Speech Audiometry Measures

Explains speech recognition threshold and word recognition score testing and their clinical significance. These scores predict aided benefit and validate fitting outcomes.

Lesson 2 • Immittance and Otoscopic Evaluation

Introduces tympanometry, acoustic reflexes, and otoscopy as pre-fitting screening tools. Identifies contraindications and referral needs before device fitting.

Lesson 3 • Pediatric and Special Population Testing

Adapts audiometric protocols for infants, children, and difficult-to-test adults. Ensures accurate threshold data across all patient populations.

Lesson 4 • Reading and Plotting the Audiogram

Covers audiogram symbols, axis conventions, and pattern recognition for common loss configurations. Accurate plotting prevents fitting errors.

Lesson 1 • Wireless Connectivity and Accessories

Reviews Bluetooth, telecoil, and proprietary wireless protocols used in modern devices. Connectivity features expand patient communication options and fitting flexibility.

Lesson 2 • Digital Signal Processing Fundamentals

Covers analog-to-digital conversion, channel-based processing, and feedback cancellation algorithms. DSP architecture determines programmable fitting flexibility.

Lesson 3 • Hearing Aid Styles and Form Factors

Compares behind-the-ear, receiver-in-canal, in-the-ear, and completely-in-canal styles by indication and cosmetics. Matches style to patient anatomy and loss degree.

Lesson 4 • Core Electronic Components

Explains microphones, amplifiers, receivers, and batteries as the signal chain. Component knowledge supports troubleshooting and patient education.

Lesson 1 • Dome and Thin-Tube Coupling Systems

Covers open, closed, and power dome selection for receiver-in-canal fittings. Dome choice balances occlusion, feedback risk, and low-frequency gain.

Lesson 2 • Earmold Materials and Styles

Compares hard acrylic, soft silicone, and hybrid earmold materials by retention, comfort, and acoustic properties. Material choice affects long-term patient compliance.

Lesson 3 • Ear Canal Anatomy for Impressions

Reviews ear canal shape, landmarks, and contraindications relevant to impression taking. Anatomical awareness prevents injury and ensures accurate mold fit.

Lesson 4 • Acoustic Modifications and Venting

Explains vent diameter, horn bores, and dampers as tools to shape frequency response at the ear. Acoustic modifications fine-tune real-ear output without reprogramming.

Lesson 1 • DSL v5 Prescriptive Method

Covers DSL v5 targets optimized for children and adults, including loudness comfort and upper limit of comfortable loudness. Preferred for pediatric fittings requiring audibility across the speech spectrum.

Lesson 2 • NAL-NL2 Prescriptive Method

Explains NAL-NL2 input variables, gain calculations, and output targets for adults and children. Widely adopted in clinical practice as a validated prescriptive standard.

Lesson 3 • Prescriptive Method Principles

Introduces the rationale behind prescriptive fitting, including audibility, comfort, and loudness normalization goals. Establishes why targets are preferred over subjective adjustment alone.

Lesson 4 • Manufacturer First-Fit Algorithms

Evaluates proprietary first-fit algorithms relative to validated prescriptive targets. Clinicians learn when manufacturer defaults are acceptable and when manual adjustment is required.

Lesson 1 • Real-Ear Measurement Equipment Setup

Covers probe tube placement, reference microphone positioning, and loudspeaker calibration for accurate measurements. Proper setup prevents systematic measurement errors.

Lesson 2 • Matching Prescriptive Targets

Teaches how to overlay real-ear aided response curves onto NAL-NL2 or DSL targets and adjust programming to close gaps. Target matching confirms audibility across the speech spectrum.

Lesson 3 • Output Limiting and OSPL90 Verification

Measures maximum output and verifies it does not exceed the patient's uncomfortable loudness level. Protects residual hearing and ensures comfort at high input levels.

Lesson 4 • Coupler Measurements and ANSI Standards

Introduces 2-cc coupler testing and standardized electroacoustic analysis for quality control and troubleshooting. Coupler data validates device performance against manufacturer specifications.

Lesson 1 • Compression Parameter Adjustment

Modifies compression thresholds, ratios, and time constants to match patient loudness preferences. Compression tuning resolves complaints about sounds being too loud or too soft.

Lesson 2 • Systematic Response to Patient Complaints

Provides a structured troubleshooting framework linking specific complaints to fitting parameter adjustments. Systematic problem-solving reduces unnecessary return visits.

Lesson 3 • Noise Reduction and Feature Programming

Adjusts noise reduction strength, wind noise management, and impulse noise suppression settings. Feature calibration balances speech clarity with listening comfort.

Lesson 4 • Fitting Software Navigation

Introduces the layout and workflow of typical hearing aid fitting software platforms. Efficient software navigation reduces fitting time and minimizes programming errors.

Lesson 1 • Long-Term Follow-Up and Maintenance

Establishes recall schedules, device cleaning protocols, and performance re-verification procedures. Ongoing care maintains fitting accuracy as hearing and device performance change over time.

Lesson 2 • Hearing Aid Orientation and User Training

Teaches patients device handling, insertion, battery management, and cleaning routines. Effective orientation reduces early returns and improves daily use compliance.

Lesson 3 • Functional Listening Validation

Uses aided speech-in-noise tests and sound-field audiometry to objectively confirm real-world benefit. Functional measures complement subjective reports with measurable performance data.

Lesson 4 • Acclimatization and Counseling Plans

Designs structured acclimatization schedules and counseling strategies for new users adjusting to amplification. Gradual exposure improves long-term adoption and satisfaction.