Tympanometry: Classifications and Measurements Study Guide
Learn about tympanometry, a key audiology procedure. Understand middle ear pressure, peak compliance, ear canal volume, and how different tympanogram types (A, As, Ad, B, C) relate to hearing loss and middle ear conditions. This guide covers acoustic immittance, acoustic reflexes, and normative values for interpretation.
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Basic Physics Principles and Acoustics
Basic Physics Principles and Acoustics
Acoustics is the science of sound, defined as a form of vibration that propagates through the air as a wave or oscillation.
- Acoustics
- Frequency
- MKS and CGS systems
- Velocity and Acceleration
- Force and Equilibrium
- Inertia and Friction
- Work and Energy
- Intensity
- Inverse Square Law
- Damping
Physics of Sound Waves and Acoustics
- Sound wave
- Simple harmonic motion
- Longitudinal waves
- Fundamental frequency
- Harmonics
- Natural resonant frequencies
- Standing wave
- Node and Antinode
- Acoustic Immittance
- Acoustic Impedance
- Sound Pressure Level (SPL)
- Weighting
Pure Tone Audiometry and Clinical Testing
Pure Tone Audiometry Fundamentals
The assessment of hearing ability testing how well an individual can perceive different frequencies and intensities of sound.
- Pure Tone Audiometry
- Hearing Threshold
- Audiogram
- Audiometer
- Transducers
- ANSI Standards
- dB HL
- dB SPL
Pure Tone Audiometry and Threshold Testing
Pure tone audiometry evaluates air and bone conduction to determine hearing thresholds across various frequencies.
- Air Conduction
- Bone Conduction
- Hearing Threshold
- Equal Loudness Contour
- Occlusion Effect
- Audiogram
- Pure Tone Threshold Search
Pure Tone Audiometry and Audiogram Interpretation
An examination of audiogram components including air conduction, bone conduction, and symbols used to identify hearing loss type and configuration.
- Air Conduction (AC)
- Bone Conduction (BC)
- Masked and Unmasked testing
- Audiogram symbols
- Hearing loss configuration
- Degree of hearing loss
Methods for Finding Hearing Thresholds
Methods for Determining Audiometric Thresholds
- Audiometric threshold
- Ten down five up technique
- Decibel (dB) intensity
- Audiogram
- Air conduction frequencies
Basic Physics Principles and Sound Wave Properties
Basic Physics Principles and Acoustics
A study of the science of sound, including vibration, frequency, and intensity, alongside fundamental physics principles such as mass, force, energy, and the inverse square law.
- Acoustics
- Frequency
- MKS and CGS systems
- Velocity and Acceleration
- Force and Equilibrium
- Inertia and Friction
- Elasticity and Damping
- Work and Energy
- Intensity
- Inverse Square Law
- Sound
- Intensity and Inverse Square Law
Basic Physics Principles of Sound and Impedance
This topic covers sound wave properties, harmonics, natural resonant frequencies, acoustic immittance, impedance, and sound pressure level measurements.
- Sound wave
- Simple harmonic motion
- Longitudinal waves
- Fundamental frequency
- Harmonics
- Natural resonant frequencies
- Node
- Antinode
- Acoustic Immittance
- Acoustic Impedance
- Sound Pressure Level (SPL)
- Weightings
- Nodes and Antinodes
- Quarter Length Resonator
- Sound Level Meter Weightings
Foundations of Audiology and Auditory Anatomy
Introduction to Audiology and Scope of Practice
Audiology is a clinical profession and scientific study involving the prevention, identification, diagnosis, and evidence-based treatment of hearing, balance, and other auditory disorders.
- Audiology
- Person-centered care
- Scope of practice
- Hearing loss
- Balance and vestibular systems
- Early Hearing Detection and Intervention (EHDI)
- Auditory rehabilitation
- Diagnostic measures
- Technology interventions
Anatomy of the Human Ear
An overview of the conductive, sensorineural, and central auditory systems including the temporal bone, outer ear, and middle ear structures.
- Conductive System
- Sensorineural System
- Central Auditory Nervous System
- Temporal Bone
- Pinna
- External Auditory Meatus
- Tympanic Membrane
- Ossicles
- Eustachian Tube
- Interaural Time Difference
- Interaural Intensity Difference
- Acoustic Reflex
Middle Ear Impedance Matching Mechanisms
The middle ear acts as an impedance-matching transformer to overcome the opposition to energy flow between air and cochlear fluids.
- Impedance
- Middle Ear Transformer
- Area Ratio
- Ossicular Lever Action
- Conductive Hearing
Anatomy of the Cochlea and Inner Ear
The cochlea is a snail-shaped, fluid-filled structure containing the osseous and membranous labyrinths that facilitate hearing.
- Cochlea anatomy
- Osseous labyrinth
- Membranous labyrinth
- Scala vestibuli
- Scala media
- Scala tympani
- Endolymph
- Organ of Corti
- Basilar membrane
- Hair cells
Cochlear Mechanics and Frequency Theories
This topic explores cochlear excitation, inhibition, and the mechanisms of frequency distinction within the auditory system.
- Stereocilia excitation and inhibition
- Depolarization and hyperpolarization
- Cochlear amplifier
- Resonance Place Theory
- Temporal Theory
- Traveling Wave Model
- Basilar membrane stiffness gradient
Anatomy of Auditory and Vestibular Systems
This topic covers the central auditory pathway, neural coding mechanisms, and the anatomical structures of the vestibular system.
- Central Auditory Pathway
- Tonotopic Organization
- Phase Locking
- Volley Principle
- Characteristic Frequency
- Semicircular Canals
- Otolithic Membrane
- Afferent and Efferent Nerve Fibers
Anatomy and Function of the Outer and Middle Ear
Anatomy of the Human Ear
An overview of the conductive, sensorineural, and central auditory nervous systems including the temporal bone, outer ear, and middle ear structures.
- Conductive System
- Sensorineural System
- Central Auditory Nervous System
- Temporal Bone
- Pinna
- External Auditory Meatus
- Tympanic Membrane
- Ossicles
- Eustachian Tube
- Interaural Time Difference
- Interaural Intensity Difference
- Acoustic Reflex
Tympanogram Classifications and Clinical Interpretations
Understanding Tympanogram Classifications and Measurements
This educational content explains tympanogram types, middle ear pressure, peak compliance, and ear canal volume measurements.
- Tympanogram types (A, AS, AD, B, C)
- Middle ear pressure
- Peak compliance
- Ear canal volume
- Conductive hearing loss
- Sensory neural hearing loss
- Static admittance
- Decapascals
Understanding Tympanogram Classifications and Measurements
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Descriptors of Hearing Loss Degree, Configuration, and Type
Descriptors and Degrees of Hearing Loss
Classification of hearing loss through descriptors including degree, configuration, and type.
- Degree of Hearing Loss
- Configuration
- Type of Hearing Loss
- Conductive Hearing Loss
- Sensorineural Hearing Loss
- Mixed Hearing Loss
- Normal Hearing Thresholds
- Mild Hearing Loss
- Severe Hearing Loss
- Pure Tone Average (PTA)
Pure Tone Audiometry Configuration and Degree
Describing hearing loss based on how thresholds present on a graph using degree, configuration, and frequency range.
- Configuration of Hearing Loss
- Cookie bite
- Reverse cookie bite
- Noise notch
- Rising
- Flat
- Hearing Loss Degree
- Frequency range
Types of Hearing Loss Classification
Classification of hearing loss based on air conduction thresholds, bone conduction thresholds, and the air bone gap.
- Sensorineural Hearing Loss
- Conductive Hearing Loss
- Mixed Hearing Loss
- Air Bone Gap
- Air Conduction Thresholds
- Bone Conduction Thresholds
Threshold Search Procedures and Audiogram Fundamentals
Audiometric Thresholds and Hearing Loss Classification
Methods for determining audiometric thresholds using air and bone conduction symbols to classify hearing loss by degree, configuration, and type.
- Air conduction thresholds
- Bone conduction thresholds
- Audiogram symbols
- Degree of hearing loss
- Configuration of hearing loss
- Type of hearing loss
- Pure tone average
- Unmasked bone conduction
- Sloping configuration
- Cookie bite configuration
- Noise notch
Understanding Audiometric Thresholds and Hearing Loss Classification
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Middle Ear Impedance and Transformer Mechanisms
Middle Ear Impedance and Transformer Mechanisms
The middle ear acts as an impedance-matching transformer to overcome the opposition to energy flow between air and cochlear fluids.
- Impedance
- Middle Ear Transformer Problem
- Area Ratio
- Ossicular Lever Action
- Conductive Hearing
Tympanometry and Acoustic Reflex Testing
Middle Ear Admittance and Acoustic Reflexes
An examination of tympanogram types and the physiological pathways of acoustic reflexes involving the eighth and seventh cranial nerves.
- Tympanogram types
- Acoustic reflexes
- Stapedius muscle contraction
- Ipsilateral measurement
- Contralateral measurement
- Vestibular cochlear nerve
- Facial nerve nucleus
- Superior olivary complex
- Admittance
Identifying Degree, Configuration, and Type of Hearing Loss
Describing Pure Tone Audiometry Results
Describing hearing loss involves identifying the degree, configuration, and type across specific frequency ranges.
- Degree of hearing loss
- Configuration of hearing loss
- Type of hearing loss
- Frequency ranges
- Sensorineural hearing loss
- Conductive hearing loss
- Bone conduction symbols
Cochlear Mechanics and the Central Auditory Pathway
Anatomy of the Cochlea and Labyrinths
The cochlea is a snail-shaped, fluid-filled structure consisting of an osseous labyrinth and a membranous labyrinth.
- Cochlea anatomy
- Modiolus
- Osseous spiral lamina
- Scala vestibuli
- Scala media
- Scala tympani
- Endolymph
- Basilar membrane
Anatomy and Function of the Organ of Corti
- Organ of Corti
- Inner Hair Cells (IHC)
- Outer Hair Cells (OHC)
- Tectorial Membrane
- Stereocilia Excitation and Inhibition
- Cochlear Amplifier
- Resonance Place Theory
- Temporal Theory
- Traveling Wave Model
Anatomy of Auditory and Vestibular Systems
The auditory pathway processes sound through the cochlea and central nervous system, while the vestibular system detects motion and gravity.
- Cochlea
- Basilar Membrane
- Inner Hair Cells
- Outer Hair Cells
- Central Auditory Pathway
- Tonotopic Organization
- Phase Locking
- Volley Principle
- Characteristic Frequency
- Semicircular Canals
- Utricle
- Saccule
- Middle Ear Transformer
Acoustic Reflexes and Clinical Masking
Clinical Masking and Cross Hearing
An overview of clinical masking, interoral attenuation, and the distinction between test ears and non-test ears to prevent cross hearing.
- Clinical masking
- Test ear
- Non-test ear
- Crossover
- Cross hearing
- Interoral attenuation
- Headphones
- Inserts
- Bone oscillator
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