Your FREE Praxis Audiology (5343) Flashcards 2026 – 200+ Cards

The visible cartilaginous outer ear. It collects and funnels sound into the ear canal and aids sound localization, especially for high frequencies through spectral (pinna) cues.

The ear canal running from the concha to the tympanic membrane (~25 mm in adults). It channels sound, protects the eardrum, and provides a natural resonance that boosts gain near 2,700 Hz.

The eardrum — a thin, cone-shaped membrane separating the outer and middle ear. It vibrates in response to sound and transmits that energy to the ossicular chain via the malleus.

The three middle-ear bones — malleus, incus, and stapes — that conduct vibration from the tympanic membrane to the oval window, providing impedance matching between air and cochlear fluid.

The smallest bone in the body and the last ossicle; its footplate seats in the oval window and transmits vibration into the cochlear fluids. Stapes fixation causes conductive loss (otosclerosis).

The middle ear's amplification (~30 dB) that overcomes the mismatch between air and cochlear fluid, mainly via the eardrum-to-oval-window area ratio (~17:1) and ossicular lever action.

The passage connecting the middle ear to the nasopharynx. It equalizes middle-ear pressure with ambient pressure; dysfunction causes negative pressure and Type C tympanograms or effusion.

The snail-shaped, fluid-filled inner-ear organ of hearing. It transduces mechanical vibration into neural signals and is tonotopically organized — high frequencies at the base, low at the apex.

The sensory epithelium on the basilar membrane containing inner and outer hair cells. It transduces basilar-membrane motion into neural activity in the auditory (VIIIth) nerve.

The primary sensory receptors of hearing; roughly one row of ~3,500 cells that synapse with ~90-95% of afferent auditory-nerve fibers and carry the main signal to the brain.

Three rows of motile cells that act as the cochlear amplifier, sharpening frequency tuning and boosting sensitivity by ~40-50 dB. Their motility generates otoacoustic emissions.

The membrane within the cochlea that vibrates as a traveling wave; its graded stiffness creates tonotopy — stiff/narrow base for high frequencies, floppy/wide apex for low frequencies.

The orderly frequency-to-place mapping preserved from the cochlea through the central auditory pathways, with high frequencies at the cochlear base and low frequencies at the apex.

The +80 mV resting potential of the scala media (endolymph), maintained by the stria vascularis. It powers hair-cell transduction; its loss reduces cochlear sensitivity.

The potassium-rich fluid filling the scala media (cochlear duct) and the membranous labyrinth. Its high K+ concentration drives hair-cell depolarization during transduction.

The sodium-rich fluid (similar to other extracellular fluids) filling the scala vestibuli and scala tympani, surrounding the membranous labyrinth and conducting the traveling wave.

The vestibulocochlear nerve carrying afferent auditory signals from the cochlea to the cochlear nucleus. Retrocochlear lesions (e.g., vestibular schwannoma) affect its function.

The ascending route from cochlear nucleus to superior olivary complex, lateral lemniscus, inferior colliculus, medial geniculate body, and auditory cortex; supports binaural and complex processing.

The first brainstem site receiving binaural input; it computes interaural time and level differences for sound localization and mediates the acoustic reflex pathway.

The balance organs of the inner ear — three semicircular canals (angular acceleration) and two otolith organs, the utricle and saccule (linear acceleration and gravity).

Three roughly orthogonal fluid-filled loops (anterior, posterior, horizontal) that sense angular (rotational) head acceleration via endolymph movement bending the cupula.

The utricle and saccule, which sense linear acceleration and head tilt relative to gravity using calcium-carbonate crystals (otoconia) on a gelatinous macula.

The number of cycles of a sound wave per second, measured in hertz (Hz); it corresponds to perceived pitch. The audiogram tests roughly 250-8,000 Hz.

The amount of acoustic energy in a sound, related to perceived loudness and expressed on the decibel scale; doubling distance from a point source reduces intensity by ~6 dB.

A logarithmic ratio unit for sound: $\text{dB} = 20 \log_{10}\!\left(\dfrac{P}{P_{0}}\right)$ for pressure. A 10× pressure increase equals $20$ dB.

Sound pressure level referenced to $20\,\mu\text{Pa}$, the physical (absolute) decibel scale used to calibrate equipment and describe environmental sound.

Hearing level — the audiometric scale referenced to average normal-hearing thresholds, so $0$ dB HL is normal at each frequency. Audiograms are plotted in dB HL.

Sensation level — decibels above an individual listener's own threshold for a stimulus. A presentation at $40$ dB SL is $40$ dB above that person's threshold.

The opposition to the flow of acoustic energy through the middle-ear system, governed by mass, stiffness, and friction. Tympanometry measures changes in admittance (its reciprocal).

The frequency at which a system vibrates most readily. Ear-canal resonance (~2,700 Hz) and middle-ear resonance shape the frequency response and natural amplification of the auditory system.

The study of the relationship between physical sound properties and their perception — pitch, loudness, timbre, masking, and localization.

The perceptual correlate of intensity; it grows nonlinearly with sound pressure. Recruitment is the abnormally rapid growth of loudness seen in cochlear hearing loss.

The perceptual correlate of frequency, encoded by cochlear place (tonotopy) and the temporal firing pattern (phase locking) of auditory-nerve fibers.

The skull bone housing the entire auditory and vestibular peripheral apparatus, including the external canal, middle-ear cavity, and the otic capsule of the inner ear.

Loss from an outer- or middle-ear problem blocking sound conduction. The audiogram shows normal bone conduction, reduced air conduction, and an air-bone gap.

Loss from cochlear (sensory) or auditory-nerve (neural) damage. Air and bone conduction are reduced together with no significant air-bone gap.

A combination of conductive and sensorineural components: both air and bone conduction are reduced, with an air-bone gap reflecting the conductive part.

Age-related sensorineural hearing loss, typically bilateral, symmetric, and most pronounced in the high frequencies, often with disproportionate difficulty understanding speech in noise.

Damage to the cochlea or vestibular system from drugs such as aminoglycoside antibiotics, platinum-based chemotherapy (cisplatin), loop diuretics, and high-dose aspirin.

Abnormal bony remodeling of the otic capsule that fixes the stapes footplate, producing progressive conductive (sometimes mixed) loss, often with a Carhart notch at 2,000 Hz.

A program to screen every newborn's hearing before discharge, using OAEs and/or automated ABR to detect congenital hearing loss early; mandated in most U.S. states.

Early Hearing Detection and Intervention — the public-health framework following the 1-3-6 benchmarks: screen by 1 month, diagnose by 3 months, enroll in intervention by 6 months.

The EHDI benchmark: hearing screening by age 1 month, audiologic diagnosis by 3 months, and early intervention enrollment by 6 months for infants with hearing loss.

A fast, non-invasive newborn screen that measures sounds produced by healthy outer hair cells; absent emissions flag possible loss but cannot detect neural (retrocochlear) problems.

An automated auditory brainstem response screen using a fixed level (often $35$ dB nHL); it detects neural conduction problems including auditory neuropathy that OAEs miss.

A condition with present OAEs but absent/abnormal ABR, reflecting normal outer-hair-cell function with disrupted neural transmission; why NICU infants are screened with AABR.

An OSHA-required program triggered at an $85$ dBA 8-hour TWA, including noise monitoring, audiometric testing, hearing protection, training, and recordkeeping.

The OSHA limit of $90$ dBA as an 8-hour time-weighted average, using a $5$ dB exchange rate; the action level for a conservation program is $85$ dBA.

The NIOSH-recommended limit of $85$ dBA as an 8-hour time-weighted average using a more protective $3$ dB exchange rate.

The increase in noise level that halves the allowable exposure time. OSHA uses $5$ dB; NIOSH uses $3$ dB, which is based on equal-energy principles.

Sensorineural loss from excessive noise, classically showing a 'noise notch' at 3,000-6,000 Hz (often 4,000 Hz) with recovery at 8,000 Hz; preventable with hearing protection.

Under OSHA, an average shift of $10$ dB or more at 2,000, 3,000, and 4,000 Hz in either ear relative to the baseline audiogram, triggering follow-up action.

Earplugs and earmuffs rated by a Noise Reduction Rating (NRR) that attenuate noise reaching the ear; proper fit and consistent use are essential to real-world protection.

Serial audiologic testing (including high-frequency audiometry and OAEs) before and during treatment with ototoxic drugs to detect early changes and inform clinical decisions.

Audiologist removal of impacted earwax (within scope of practice) via curette, irrigation, or suction, when it blocks the canal, testing, or device fitting and no contraindication exists.

The perception of sound (ringing, buzzing) without an external source. It often accompanies hearing loss and noise exposure and is assessed by pitch/loudness matching and self-report measures.

JCIH factors prompting monitoring even with a passed screen — NICU stay, family history, in-utero infections (CMV), craniofacial anomalies, syndromes, and ototoxic exposure.

A pass/refer screen presenting tones at a fixed level (commonly $20$ dB HL) at selected frequencies (1,000/2,000/4,000 Hz) to identify those needing full evaluation.

Periodic pass/refer screening of school-age children to identify hearing loss affecting learning, typically at $20$ dB HL across mid-to-high frequencies.

The reference audiogram (obtained after a quiet period) against which future tests are compared in a conservation program to detect a standard threshold shift.

The core behavioral test measuring hearing thresholds for pure tones by air and bone conduction, plotted on the audiogram in dB HL across 250-8,000 Hz.

Threshold testing through earphones or inserts; the signal travels the whole pathway (outer, middle, inner ear, nerve), so it reflects the total amount of hearing loss.

Threshold testing via a bone oscillator on the mastoid/forehead that bypasses the outer and middle ear to stimulate the cochlea directly, isolating the sensorineural component.

The difference (in dB) between air- and bone-conduction thresholds at a frequency; a gap of $\ge 10$ dB indicates a conductive component.

Presenting noise to the non-test ear to keep it from responding, preventing crossover when the test signal could be heard by the better ear (cross-hearing).

The energy lost as sound crosses the skull to the other cochlea — roughly $40$ dB for supra-aural earphones, $0$ dB for bone conduction, and higher for inserts.

The average of air-conduction thresholds at 500, 1,000, and 2,000 Hz; it summarizes hearing for the speech range and should agree closely with the SRT.

The lowest level (dB HL) at which a listener correctly repeats ~50% of spondee words; it cross-checks the pure-tone average, which it should be within ~6-7 dB of.

The percentage of phonetically balanced monosyllabic words correctly repeated at a suprathreshold level; it gauges clarity/speech understanding, separate from sensitivity.

Two-syllable words with equal stress (e.g., 'baseball,' 'hotdog') used to establish the speech recognition threshold because their familiarity and energy make them easy to score.

The lowest level at which a listener can just detect (not identify) the presence of speech, typically ~8-9 dB better than the SRT; used when SRT can't be obtained.

The intensity at which speech is judged most comfortable; often used as a presentation level for word-recognition testing and device fitting decisions.

The level at which sound becomes uncomfortably loud; it sets the upper limit of the dynamic range and guides hearing-aid output limiting (MPO).

The span between threshold (SRT) and the uncomfortable loudness level; a narrowed dynamic range, common in cochlear loss with recruitment, complicates amplification.

A plot of word-recognition score versus presentation level; rollover (a drop in score at high levels) suggests a retrocochlear (VIIIth-nerve) site of lesion.

A decrease in word-recognition score at high presentation levels after a peak; a rollover index above ~0.45 raises suspicion of a retrocochlear lesion.

A battery (tympanometry plus acoustic reflexes) assessing middle-ear status objectively by measuring sound energy flow as ear-canal pressure is varied.

An objective test of middle-ear function that plots admittance as ear-canal pressure sweeps from positive to negative, yielding a tympanogram type.

A normal tympanogram with a peak admittance near $0$ daPa and normal compliance, indicating normal middle-ear pressure and mobility.

A shallow (low-amplitude) tympanogram with a normal-pressure peak, indicating a stiff/fixed system such as otosclerosis or a thickened tympanic membrane.

A deep (high-amplitude) tympanogram with a normal-pressure peak, indicating a hypermobile system such as ossicular discontinuity or a monomeric eardrum.

A flat tympanogram with no clear peak. With normal canal volume it suggests effusion/fluid; with large volume it suggests a perforation or patent PE tube.

A tympanogram with a peak at significantly negative pressure (more negative than ~ $-150$ daPa), indicating Eustachian-tube dysfunction with negative middle-ear pressure.

The estimated volume of air between the probe tip and eardrum; an abnormally large value with a flat tympanogram suggests perforation or an open ventilation tube.

The reflexive contraction of the stapedius muscle to loud sound, with thresholds normally near 70-100 dB HL (about 85 dB SL above threshold); its presence, absence, decay, and ipsi/contra thresholds help localize lesions in the auditory pathway.

The lowest level eliciting a measurable stapedial reflex; elevated or absent reflexes point to conductive loss, significant cochlear loss, or retrocochlear/facial-nerve involvement.

Sustained 10-second stimulation (usually 500/1,000 Hz at 10 dB above reflex threshold); reflex amplitude falling to half within 5 seconds suggests a retrocochlear lesion.

A newer immittance method measuring middle-ear energy absorbance across a broad frequency range, offering more detailed information than single-frequency tympanometry.

Low-level sounds generated by healthy outer hair cells, recorded in the ear canal; they objectively confirm cochlear (outer-hair-cell) function and are absent with >~30-40 dB loss.

OAEs elicited by brief clicks, providing a broadband check of outer-hair-cell function; widely used in newborn screening for a pass/refer outcome.

OAEs evoked by two simultaneous tones (f1, f2); the cochlea generates a distortion product (often $2f_1 - f_2$), allowing frequency-specific outer-hair-cell assessment to higher frequencies.

An auditory evoked potential reflecting synchronous neural firing from the VIIIth nerve through the brainstem, used for threshold estimation and neurodiagnostic site-of-lesion testing.

The most robust and latest ABR peak, generated near the lateral lemniscus/inferior colliculus; its presence at low levels is the key marker for ABR threshold estimation.

Lowering stimulus level until Wave V disappears to estimate hearing thresholds objectively, essential for infants and difficult-to-test patients (the EHDI diagnostic tool).

High-level ABR analyzing absolute and interaural Wave-V latencies and interwave intervals (I-III, III-V, I-V) to screen for retrocochlear pathology such as vestibular schwannoma.

An evoked potential to modulated tones that yields frequency-specific, automated threshold estimates; complements ABR, especially for severe-to-profound losses.

Recording of early cochlear/VIIIth-nerve potentials (cochlear microphonic, summating potential, action potential); an elevated SP/AP ratio supports endolymphatic hydrops/Ménière disease.

An AC receptor potential mirroring the stimulus waveform, generated mainly by outer hair cells; its presence with absent ABR is a hallmark of auditory neuropathy.

A behavioral pediatric method (~6 months-2.5 years) that conditions an infant to turn toward sound, rewarding correct head-turns with an animated visual reinforcer.

A behavioral method for toddlers/preschoolers (~2.5-5 years) who perform a play task (e.g., drop a block) each time a tone is heard, yielding ear- and frequency-specific thresholds.

Observing unconditioned reflexive responses (startle, eye-widening, cessation of activity) to sound in very young infants; least reliable, now largely supplemented by physiologic tests.

The graph plotting hearing thresholds (dB HL on the y-axis, increasing downward) against frequency (Hz on the x-axis), with standard symbols for right/left and air/bone.

O = right air conduction, X = left air conduction, < = right bone (unmasked), > = left bone; brackets/[ ] and triangles indicate masked thresholds; arrows mean no response.

Severity by threshold: normal ($\le 25$ dB), mild (26-40), moderate (41-55), moderately severe (56-70), severe (71-90), and profound ($> 90$ dB HL).

The shape of the audiogram across frequency — flat, sloping (worse highs), rising (worse lows), cookie-bite (mid-frequency), or notched (noise/ototoxic).

When a signal presented to the test ear is loud enough to be perceived by the non-test cochlea; masking the non-test ear prevents this artifact (the 'shadow curve').

A test for unilateral nonorganic (functional) loss using simultaneous tones in both ears; a positive Stenger reveals exaggerated thresholds in the 'poorer' ear.

A battery (VNG/ENG, rotary chair, VEMP, vHIT, posturography) evaluating the peripheral and central balance systems and the vestibulo-ocular reflex.

A battery using video goggles to record eye movements during oculomotor, positional, and caloric testing to identify peripheral vs central vestibular dysfunction.

Eye-movement recording via electrodes around the eyes (corneo-retinal potential) during the same battery as VNG; VNG has largely replaced it for most patients.

Irrigating each ear with warm and cool stimuli to assess the horizontal canal; a side-to-side difference (unilateral weakness) localizes a peripheral vestibular deficit.

Rotating the patient in darkness to test the horizontal vestibulo-ocular reflex across frequencies; valuable for bilateral vestibular loss and pediatric assessment.

Reflexive muscle responses to loud sound/vibration assessing otolith pathways: cervical VEMP tests the saccule/inferior nerve, ocular VEMP the utricle/superior nerve.

A bedside test recording eye and head velocity during rapid head thrusts to measure VOR gain and detect corrective (catch-up) saccades for each semicircular canal.

A positional test that provokes torsional/up-beating nystagmus to diagnose posterior-canal benign paroxysmal positional vertigo (BPPV).

Computerized dynamic posturography measures postural sway under varied visual/support conditions to assess how a patient uses sensory inputs for balance.

Visual inspection of the ear canal and tympanic membrane before testing, to identify cerumen, foreign bodies, perforations, or pathology and to clear the canal for accurate results.

Tests (e.g., QuickSIN) measuring the signal-to-noise ratio needed to understand speech in background noise — a real-world complaint not captured by quiet-room WRS.

A deficit in the central processing of auditory information despite normal peripheral hearing, assessed with dichotic, temporal, and degraded-speech tests.

Quantifying tinnitus via pitch matching, loudness matching, minimum masking level, and residual inhibition, alongside validated questionnaires (e.g., the Tinnitus Handicap Inventory).

Measuring the level at which sound becomes uncomfortable, to characterize reduced sound tolerance (hyperacusis) and to set device output limits.

Verifying that audiometric equipment delivers correct frequency and intensity to ANSI standards; biological and electroacoustic checks ensure valid, reproducible thresholds.

Foam-tip earphones offering higher interaural attenuation (reducing masking needs), better infection control, and reduced collapsing-canal artifact versus supra-aural phones.

An apparent improvement in low-frequency bone thresholds when the non-test ear is occluded by a masking earphone; clinicians account for it during masked bone testing.

A characteristic dip in bone-conduction thresholds around 2,000 Hz seen in otosclerosis; it is a mechanical artifact that typically resolves after successful stapes surgery.

A cochlear area with non-functioning inner hair cells/neurons; identified with the TEN test, it informs whether amplifying those frequencies helps or harms speech understanding.

Comparing ipsilateral and contralateral reflexes across ears to localize lesions to the middle ear, cochlea, VIIIth nerve, brainstem, or facial nerve.

(RECD) The measured difference between a real ear and a 2-cc coupler; used to individualize fitting, especially for children with small ear canals, without behavioral measures.

Validated questionnaires (e.g., APHAB, COSI, HHIE) capturing patient-perceived hearing difficulty and benefit to integrate function with audiometric data.

Presenting speech-recognition material at a fixed level above the SRT (often $30\text{-}40$ dB SL) to reach the plateau of the performance-intensity function for the best score.

An electronic device that amplifies and shapes sound to compensate for hearing loss; core components are a microphone, amplifier/digital processor, receiver, and battery.

A hearing-aid style with the components in a case behind the ear coupled to the canal by tubing and an earmold; versatile and suitable for a wide range of losses, including severe.

A BTE variant placing the receiver in the ear canal connected by a thin wire; offers a discreet fit, open coupling, and reduced occlusion for mild-to-moderate losses.

A custom hearing aid filling the concha; larger than canal styles, easier to handle, and able to house more features and a larger battery.

A small custom aid seated deep in the canal for cosmetic discretion; limited gain/output and features, best for mild-to-moderate losses.

The hearing-aid input transducer converting acoustic sound to an electrical signal; directional microphone arrays improve the signal-to-noise ratio in noise.

The output transducer (a miniature loudspeaker) that converts the amplified electrical signal back to sound delivered to the ear canal.

The custom-fit piece coupling a BTE to the ear; its style and venting affect retention, acoustics, occlusion, and feedback, and can shape the frequency response.

A bore drilled in an earmold/dome that lets low-frequency sound and pressure escape, reducing the occlusion effect at the cost of more potential feedback and less low-frequency gain.

The hollow, 'in-a-barrel' perception of one's own voice when the ear canal is blocked by a mold; minimized with venting or open fittings.

A non-occluding coupling (open dome) that leaves the canal largely open, ideal for normal/near-normal low-frequency hearing; reduces occlusion but limits low-frequency gain.

A validated formula (e.g., NAL-NL2 for adults, DSL v5.0 for children) prescribing gain and output by frequency for the patient's audiogram and age.

A prescriptive formula from the National Acoustic Laboratories aimed at maximizing speech intelligibility while keeping overall loudness comfortable, common for adults.

The Desired Sensation Level formula, often preferred for children; it targets audibility across a wide input range and is paired with RECD-based fitting.

(REM/probe-microphone) Measuring actual sound levels in the patient's ear canal to verify a hearing aid meets prescriptive targets across frequencies — the fitting gold standard.

Objectively confirming a device performs as intended — e.g., REM matching prescriptive targets and electroacoustic analysis — done before the patient relies on it.

Confirming real-world benefit and patient satisfaction using outcome measures (self-report questionnaires, aided speech testing) after the fitting.

Test-box measurement of a hearing aid's gain, output (OSPL90), frequency response, distortion, and noise against ANSI specifications for quality control.

Nonlinear amplification (WDRC) that gives more gain to soft sounds and less to loud, packing a wide range of inputs into the listener's reduced dynamic range.

(OSPL90/MPO) The highest sound level a hearing aid can produce; it is set below the patient's uncomfortable loudness level to protect against overly loud sounds.

Multi-microphone arrays that emphasize sounds from the front and attenuate those from behind/sides, improving speech understanding in noise.

Algorithms that suppress the whistling caused by amplified sound leaking back to the microphone, allowing more gain and more open fittings.

A small induction coil in a hearing aid that picks up magnetic signals from telephones and hearing loops, delivering clearer sound by bypassing room acoustics.

A surgically implanted device that bypasses damaged hair cells and electrically stimulates the auditory nerve via an electrode array for severe-to-profound sensorineural loss.

An external microphone/sound processor and transmitting coil, plus an internal receiver-stimulator and intracochlear electrode array that stimulates auditory-nerve fibers tonotopically.

Determined by severe-to-profound sensorineural loss with limited aided word recognition; criteria have broadened to include children under 12 months and asymmetric/single-sided deafness.

An osseointegrated implant that transmits sound via direct bone conduction, indicated for conductive/mixed loss, chronic ear disease, or single-sided deafness.

Using a cochlear implant in one ear and a hearing aid in the other to combine electric and acoustic hearing for better localization and speech in noise.

(ALD) Equipment improving access beyond hearing aids — remote-microphone (FM/DM) systems, loops, infrared, captioning, and alerting devices.

A remote-microphone system placing the talker's mic near the source and streaming wirelessly to the listener, dramatically improving the signal-to-noise ratio at distance and in noise.

(Induction loop) A wire encircling a room that transmits an audio signal magnetically to telecoil-equipped hearing aids/implants, delivering clear sound directly to the user.

A patient-centered program — amplification, auditory training, communication-strategy instruction, and counseling — to reduce the impact of hearing loss on daily life.

Structured listening practice to improve perception of speech and sound, especially for new cochlear-implant users and listening in noise.

Techniques taught to patients and partners — facing the talker, reducing background noise, asking for rephrasing, anticipatory and repair strategies — to ease conversation.

Using visual cues from lips, face, and gestures to supplement degraded auditory speech information; trained as part of aural rehabilitation.

Informational and emotional support helping patients and families accept hearing loss, set realistic expectations, build motivation, and adjust psychosocially.

Evidence-based approaches including sound therapy, hearing aids, cognitive-behavioral elements, and Tinnitus Retraining Therapy (TRT) combining sound enrichment with directive counseling.

(TRT) A management approach pairing low-level sound enrichment with directive counseling to promote habituation of the tinnitus signal and its emotional reaction.

Using low-level background or masking sound to reduce tinnitus prominence and promote habituation, often delivered through hearing aids or dedicated generators.

Family-centered intervention promoting listening and spoken-language or signed development, early amplification/implantation, and coordination with early-intervention and education teams.

An intervention approach developing spoken language through listening for children with hearing loss, relying on early, well-fit amplification and family coaching.

A hearing-aid feature shifting/compressing high-frequency energy into lower regions where hearing is better, improving audibility of cues like /s/ for steep high-frequency losses.

Setting a hearing aid's maximum output just below the patient's uncomfortable loudness level so amplified sound stays audible but never painfully loud.

Teaching the new user insertion/removal, battery handling, cleaning, controls, and realistic adaptation expectations to support successful, consistent use.

The large signal-to-noise-ratio improvement from placing a microphone near the talker; the single most effective intervention for understanding speech at a distance and in noise.

The soft tip on a RIC/receiver coupling the device to the canal; open, closed, or power domes are chosen to balance audibility, occlusion, and feedback.

An individualized plan integrating assessment results and patient preferences into short- and long-term goals for amplification and rehabilitation, revised with outcome data.

Best practice sequencing: first verify the device meets electroacoustic/REM targets, then validate functional benefit with the patient before finalizing the fitting.

Options for one profoundly deaf ear with normal hearing in the other: CROS hearing aids, bone-conduction devices, or a cochlear implant in the deaf ear.

(Contralateral Routing of Signal) Routes sound from a non-usable ear to the better ear, helping patients with single-sided deafness hear from their poorer side.

The ethical framework for audiologists/SLPs built on four principles: responsibility to persons served, to achieving/maintaining competence, to the public, and to professional relationships.

The ASHA principle that practitioners hold paramount the welfare of persons served professionally and treat participants in research and teaching with honesty and compassion.

The ASHA-defined range of audiology activities — prevention, identification, assessment, and (re)habilitation of auditory and vestibular disorders — within which a clinician must work.

ASHA's credential for audiologists, requiring a qualifying degree, supervised clinical experience, and a passing score on the Praxis Audiology (5343) examination.

The process of giving patients adequate information about procedures, risks, benefits, and alternatives so they can voluntarily agree before evaluation or treatment.

The ethical and legal duty (reinforced by HIPAA) to protect patient health information and disclose it only with consent or as permitted by law.

The Health Insurance Portability and Accountability Act, which sets federal standards for protecting the privacy and security of patients' protected health information.

Integrating the best available external research evidence with clinical expertise and patient values/preferences to guide audiologic decisions.

Delivering services responsive to patients' cultural and linguistic backgrounds, using qualified interpreters and culturally appropriate, valid assessment and counseling.

Accurate, timely recordkeeping of history, procedures, results, recommendations, and communications, supporting continuity of care, billing, and legal accountability.

The ethical duty to refer when a patient's needs fall outside one's competence or scope, ensuring care is provided by an appropriately qualified professional.

Standard precautions — hand hygiene, gloves, and disinfection/sterilization of probes, tips, and surfaces — to prevent cross-contamination during otologic procedures.

A situation where personal or financial interests could improperly influence professional judgment (e.g., dispensing); ethics require disclosure and prioritizing patient welfare.

Oversight of students, externs, and support personnel consistent with ASHA standards and state rules; the supervising audiologist retains responsibility for patient care.

The Individuals with Disabilities Education Act, ensuring children with disabilities (including hearing loss) receive a free appropriate public education with an IEP/IFSP.

The Americans with Disabilities Act, prohibiting disability discrimination and requiring effective communication access and reasonable accommodations for people with hearing loss.

Collaboration among audiologists, physicians, educators, SLPs, and others, sharing information (with consent) to coordinate patient-centered care.

Accountability for one's clinical actions; practicing within scope, maintaining competence, and documenting properly reduce malpractice/negligence risk.

Standards protecting human research participants — Institutional Review Board oversight, informed consent, and minimizing harm — that audiologists conducting research must follow.

Ongoing professional development required to maintain ASHA certification and state licensure, ensuring competence keeps pace with evolving evidence and technology.