Unit 3: Identification of Deafness and Assessment of Hearing- Questions

Fill in the blanks:

1. Informal assessments are primarily used for screening and daily ________.
2. In Pure Tone Audiometry, the test that physically vibrates the skull to bypass the outer and middle ear is called ________ conduction.
3. The primary objective tool used for Universal Newborn Hearing Screening (UNHS) because it measures the “echo” of outer hair cells is ________.
4. The golden rule of pediatric audiology, which states no single test result should be accepted without independent verification, is called the ________ Principle.
5. On an audiogram, the X-axis measures the pitch of sound in ________.
6. A hearing loss where both Air Conduction and Bone Conduction are abnormal with NO Air-Bone gap is classified as a ________ hearing loss.
7. The Speech Banana primarily spans from 250 Hz to ________ Hz.
8. The Ling Six Sound Test checks if a child has access to the highest frequencies of human speech by using the phoneme ________.
9. In Visual Reinforcement Audiometry (VRA), the conditioned response expected from the infant is a ________.
10. Vowels have energy peaks called ________, where the second one (F2) provides the clarity needed to distinguish sounds.

Answers:

1. Monitoring
2. Bone
3. Otoacoustic Emissions (OAE)
4. Cross-Check
5. Hertz (Hz)
6. Sensorineural
7. 6000
8. [s]
9. Head turn
10. Formants

Tick the correct option:

1. Which informal assessment is most crucial for daily monitoring of a child’s cochlear implant across the entire speech spectrum?

A) Distraction Test

B) Pure Tone Audiometry

C) Ling Six Sound Test

D) Name Calling Test

2. What specifically does Tympanometry measure?

A) The electrical activity of the auditory nerve

B) The mobility of the Tympanic Membrane and middle ear bones C) The softest decibel level a patient can hear D) The ability to understand complex vocabulary

Which behavioral test is most appropriate for a neurotypical 3-year-old child? A) Behavioral Observation Audiometry (BOA) B) Visual Reinforcement Audiometry (VRA) C) Conditioned Play Audiometry (CPA) D) Otoacoustic Emissions (OAE)

If an audiogram shows normal bone conduction but abnormal air conduction (a significant Air-Bone Gap), what type of hearing loss is indicated? A) Mixed Hearing Loss B) Sensorineural Hearing Loss C) Central Auditory Processing Disorder D) Conductive Hearing Loss

On a standard audiogram grid, the Left Ear Air Conduction (unmasked) is traditionally recorded using which symbol? A) Red O B) Blue X C) Red < D) Blue >

In the Speech Banana, voiceless fricatives like /s/ and /f/ are located in the: A) Low frequencies, high intensities B) High frequencies, low intensities C) Low frequencies, low intensities D) High frequencies, high intensities

The phenomenon where a child stops responding during a conditioned hearing test because the reward has become boring is called: A) False Positive B) Extinction C) Masking D) Acoustic Smearing

BERA (Brainstem Evoked Response Audiometry) is highly accurate for diagnosing severe sensorineural loss in infants by measuring: A) The physical echo of the cochlea B) Unconditioned startle reflexes C) Electrical activity of the auditory nerve and brainstem D) Air pressure in the ear canal

A “Cookie Bite” hearing loss configuration indicates: A) A sharp drop exactly at 4000 Hz B) Normal hearing at low and high frequencies, but a drop in the middle frequencies C) Better hearing in high frequencies than low frequencies D) Perfectly flat thresholds across all frequencies

What does the Speech Reception Threshold (SRT) measure? A) The softest volume at which a patient can correctly repeat 50% of simple words B) The clarity of words played at a painfully loud volume C) The physical movement of the eardrum when speech is played D) The infant’s ability to turn their head toward a speaker

True or False

1. Formal assessments are standardized clinical tests performed in natural environments like classrooms.
2. Bone conduction testing assesses the entire ear pathway, including the outer, middle, and inner ear.
3. Tympanometry is an objective test that directly measures a person’s hearing threshold in decibels.
4. A 4-year-old with severe cognitive delays should always be tested using Conditioned Play Audiometry (CPA) simply because of their chronological age.
5. Pre-conditioning a child in the classroom before an audiology appointment can significantly reduce testing time and increase accuracy in the clinic.
6. On an audiogram, the Y-axis measures intensity (loudness), with the top of the graph representing very soft sounds and the bottom representing very loud sounds.
7. An Air-Bone Gap (ABG) is considered clinically significant if it is greater than 10 dB.
8. Consonants like /s/ and /f/ carry the rhythm and volume of speech and are located on the low-frequency side of the Speech Banana.
9. A “Refer” result on an Otoacoustic Emissions (OAE) test indicates that there is likely a blockage or cochlear damage.
10. Speech Audiometry is used to test how well a patient hears and understands actual human speech, rather than just pure tone beeps.

Answers:

1. False
2. False
3. False
4. False
5. True
6. True
7. True
8. False
9. True
10. True

Very Short Answer Type Questions:

1. What is the primary purpose of informal hearing assessments?
2. Name the lowest-frequency phoneme and the highest-frequency phoneme used in the Ling Six Sound Test.
3. What does “PTA” stand for in formal clinical testing?
4. Which objective test is capable of diagnosing fluid behind the eardrum (Otitis Media)?
5. At what age range is Visual Reinforcement Audiometry (VRA) typically utilized?
6. Who established the principle of Operant Conditioning, which forms the basis for pediatric audiology tests?
7. What severity of hearing loss is indicated by a threshold of 45 dB HL?
8. What type of hearing loss features an abnormal air conduction score but a normal bone conduction score?
9. What does the acronym “ABG” stand for in audiogram interpretation?
10. Which range of frequencies (in Hz) represents the most critical span for conversational human speech?

Answers:

1. Screening and daily monitoring of hearing/device function.
2. Lowest: [m] or [oo]. Highest: [s].
3. Pure Tone Audiometry.
4. Tympanometry (Impedance Audiometry).
5. 6 months to 2.5 years.
6. B.F. Skinner.
7. Moderate Hearing Loss.
8. Conductive Hearing Loss.
9. Air-Bone Gap.
10. 500 Hz to 4000 Hz.

Short Answer Type Questions:

1. Differentiate between the pathways tested by Air Conduction and Bone Conduction.
2. Why is the “Cross-Check” principle essential in pediatric audiology?
3. Briefly describe the mechanism and clinical result of Otoacoustic Emissions (OAE).
4. How can a special educator effectively pre-condition a child for Conditioned Play Audiometry (CPA)?
5. Explain the concept of “Extinction” during a conditioned hearing test and how audiologists manage it.
6. What is the Speech Reception Threshold (SRT), and how is it modified for young children who cannot speak clearly?
7. Outline the specific audiogram criteria used to identify a Mixed Hearing Loss.
8. Explain the difference between the first formant (F1) and the second formant (F2) in vowel acoustics.
9. Why do audiologists use the “Speech Banana” shape to represent human speech?
10. Describe two behavioral “red flags” an educator might notice in a classroom that suggest a student is experiencing listening fatigue or hearing loss.

Answers:

1. Air conduction uses headphones to send sound through the entire auditory system (outer, middle, and inner ear). Bone conduction uses a vibrating headband placed on the mastoid bone to vibrate the skull, sending sound directly to the inner ear (cochlea), bypassing the outer and middle ear.
2. The Cross-Check principle states that no single behavioral test result should be accepted without verification. Because young children can be frightened, uncooperative, or easily distracted, behavioral results can be inaccurate. They must be cross-checked with an objective physiological test (like an ABR or OAE) before a diagnosis is finalized.
3. A tiny microphone plays clicks into the ear canal. If the outer hair cells of the cochlea are healthy, they vibrate and generate a faint “echo.” If the microphone detects the echo (Pass), the outer/middle ear are healthy. If no echo is detected (Refer), there is potential damage or blockage.
4. An educator can spend a week playing the “Listening Game” in the classroom. They teach the child to hold a block, wait for a sound (like a drumbeat or whistle), and immediately drop the block into a bucket upon hearing the sound, praising them enthusiastically.
5. Extinction occurs when a child stops responding because the reward (dropping a block or seeing a toy) becomes boring. Audiologists manage this by working very fast, frequently switching out the toys, or changing the visual reinforcement to maintain the child’s motivation.
6. SRT finds the softest volume at which a patient can correctly repeat 50% of simple words. For young children, the audiologist modifies this by having the child point to pictures (like a hot dog or airplane) or body parts instead of asking them to speak the words aloud.
7. In a Mixed Hearing Loss, both Air Conduction (AC) and Bone Conduction (BC) scores are abnormal (falling below 25 dB). However, there is still a significant Air-Bone Gap (>10 dB) where the AC score is significantly worse than the BC score.
8. F1 (First Formant) is a low-frequency energy peak that tells the listener a vowel is present. F2 (Second Formant) is a higher-frequency energy peak that provides the acoustic clarity necessary to distinguish one vowel from another (e.g., distinguishing “beat” from “boot”).
9. Human speech is not perfectly flat. The majority of speech sounds cluster in the middle frequencies at moderate volumes, tapering off at the extreme high/low frequencies and very soft/loud intensities. When mapped on an audiogram, this cluster forms the distinct shape of a banana.
10. Two red flags include “Visual Reliance” (the child stares intensely at the teacher’s lips and struggles if the teacher turns around) and “Inattention/Fatigue” (the child appears to daydream or becomes physically exhausted by midday due to the cognitive load of trying to hear).

Long Answer Type Questions:

1. Compare and contrast informal and formal assessments of hearing, discussing their primary purposes, the specific tools used, the environments in which they occur, and who administers them.
2. Discuss the three objective formal tests (OAE, BERA/ABR, and Tympanometry) in detail. Explain their underlying scientific mechanisms and their specific clinical uses in pediatric audiology.
3. Trace the steps of operant conditioning used in Conditioned Play Audiometry (CPA). Explain the Training Phase, the Testing Phase, and how audiologists address challenges like false positives and developmental delays.
4. Explain the systematic process of interpreting an audiogram. Detail how an audiologist determines the degree, type, and configuration of a hearing loss using standard symbols and the X/Y axes.
5. Analyze the “Speech Banana” concept. Detail how the acoustics of vowels and consonants are mapped within this region and discuss the pedagogical implications for special educators using this tool.
6. Discuss the developmental progression from Behavioral Observation Audiometry (BOA) to Visual Reinforcement Audiometry (VRA) to Conditioned Play Audiometry (CPA). Highlight why specific neurological and motor milestones necessitate these changes in testing methods.
7. A child’s audiogram reveals a “high-frequency sloping loss.” Detail how this specific configuration will affect their speech perception in a classroom setting, outlining the acoustic reasons behind this difficulty using the Speech Banana model.
8. Examine the golden rules for identifying Sensorineural, Conductive, and Mixed hearing losses. Provide a detailed explanation of how Air Conduction scores, Bone Conduction scores, and the Air-Bone Gap interact in each of the three types.
9. Evaluate the role of the special educator in the audiological assessment process. Focus on the importance of the Ling Six Sound Test for daily monitoring and the value of classroom pre-conditioning for clinical testing.
10. Explain the components and purpose of Speech Audiometry (SRT and SDS). Discuss why these tests are necessary beyond standard Pure Tone Audiometry, and how a clinician would adapt a Speech Detection Threshold (SDT) test for an infant with severe language delays.

Answers:

1. Informal vs. Formal Assessments: Informal assessments are non-standardized behavioral checks used primarily for screening and daily monitoring. They are conducted in natural environments like homes or classrooms by parents or educators using noisemakers, conversational voice, or the Ling Six sounds. They yield a “pass/refer” observational result. Formal assessments are standardized clinical tests used for medical diagnosis and prescribing hearing aids. They are conducted in soundproof clinical booths by certified audiologists using calibrated equipment (audiometers, electrodes). They yield highly specific diagnostic data, such as an audiogram with exact decibel and Hertz measurements.
2. Objective Tests: Objective tests require no active participation from the patient.
   • OAE (Otoacoustic Emissions): Uses a microphone to measure faint echoes produced by healthy outer hair cells vibrating in the cochlea. It is fast, painless, and the primary tool for Universal Newborn Hearing Screening.
   • BERA/ABR (Brainstem Evoked Response Audiometry): Uses scalp electrodes to measure the electrical signal traveling from the auditory nerve to the brainstem. It is the definitive diagnostic test for infants under 6 months to determine exact decibel thresholds while they sleep.
   • Tympanometry: Measures the physical mechanics and mobility of the eardrum and middle ear bones by altering air pressure. It is critical for instantly diagnosing temporary conductive issues like fluid buildup (Otitis Media) in toddlers.
3. CPA Conditioning: Operant conditioning shapes behavior via consequences. In the Training Phase, the audiologist plays a loud, audible sound and physically guides the child’s hand to drop a block into a bucket, immediately providing enthusiastic praise. This pairs the sound with the action and reward. In the Testing Phase, the audiologist plays a softer sound and waits without prompting. If the child drops the block independently, they are rewarded. To handle False Positives (dropping the block without a sound to get a reward), the audiologist withholds praise and re-trains the child to “Wait.” If a child has Developmental Delays and lacks the attention for CPA, the audiologist must regress to VRA.
4. Interpreting an Audiogram: The audiogram plots pitch (Frequency in Hz) on the X-axis and loudness (Intensity in dB HL) on the Y-axis. The further down the symbols fall, the worse the hearing loss.
   • Degree: Determined by where the Air Conduction (AC) symbols (Red O for Right, Blue X for Left) fall on the Y-axis (e.g., 41-55 dB is Moderate).
   • Type: Determined by comparing AC to Bone Conduction (BC) symbols (< or >). A gap greater than 10 dB between them determines if it is Conductive, Sensorineural, or Mixed.
   • Configuration: Determined by the shape the symbols make across the graph (e.g., Flat, Sloping, Rising, Cookie Bite, Noise Notch).
5. The Speech Banana: The Speech Banana is an outline on the audiogram (250–6000 Hz, 20–60 dB) encompassing conversational speech. The left side (low frequencies) houses loud vowels and nasals, providing the “Power” and rhythm of speech. The right side (high frequencies) houses soft, voiceless consonants (/s/, /f/, /th/), providing the “Clarity” and meaning. Pedagogically, special educators use this to predict speech errors (e.g., a student missing 4000 Hz will mispronounce /s/), validate daily hearing aid function, and visually justify the need for classroom accommodations like FM systems.
6. Developmental Testing Progression: Audiologists match the test to the child’s neuro-motor age.
   • BOA (0-6 months): Relies on unconditioned reflexes (startling, eye-widening) because infants lack the motor control for localized responses.
   • VRA (6 months – 2.5 years): By 6 months, infants have the neck strength to reliably turn their heads and are driven by visual curiosity, so they are conditioned to turn toward a sound for a visual reward (dancing toy).
   • CPA (2.5 – 5 years): Toddlers outgrow visual curiosity but develop fine motor skills and seek adult approval. They are conditioned to complete a play task (dropping a block) for social praise.
7. High-Frequency Sloping Loss: In this configuration, hearing is normal in the low frequencies but drops drastically in the high frequencies. According to the Speech Banana, the student will easily hear the left-side, low-frequency vowels, meaning they will perceive the volume and melody of speech (the “power”). However, the right-side, high-frequency consonants (/s/, /f/, /th/) fall below their threshold. Consequently, the student loses the “clarity” of speech. Words like “Math” and “Map” will sound identically muffled, and they will struggle significantly to understand female voices or classroom instruction without visual lip-reading cues.
8. Types of Hearing Loss Rules: * Sensorineural (SNHL): Both AC and BC scores are abnormal (below 25 dB), and there is NO significant Air-Bone Gap (they are within 10 dB). The damage is deep in the cochlea/nerve.
   • Conductive (CHL): BC is normal, but AC is abnormal, creating a significant Air-Bone Gap (>10 dB). The inner ear is healthy, but a blockage in the outer/middle ear is stopping sound.
   • Mixed (MHL): Both AC and BC are abnormal, but there IS a significant Air-Bone Gap where AC is worse than BC. The patient has inner ear nerve damage compounded by a middle ear blockage.
9. Role of the Special Educator: While an audiologist formally diagnoses, the educator is the frontline monitor. Their primary tool is the Ling Six Sound Test, conducted daily to ensure a child’s cochlear implant or hearing aid is capturing the full spectrum of speech (from [m] to [s]). If a child fails the high frequencies, the educator knows the device is malfunctioning. Furthermore, educators perform classroom pre-conditioning. By teaching the child the rules of play audiometry (listen, wait, drop block) in a safe school environment, they eliminate the child’s fear of the clinical setting, resulting in faster and more accurate medical testing.
10. Speech Audiometry (SRT and SDS): Pure Tone Audiometry only tests the ability to hear beeps, which does not guarantee the brain can decode complex language. Speech Audiometry tests actual human communication. SRT (Speech Reception Threshold) finds the softest volume where 50% of words are understood, while SDS (Speech Discrimination Score) plays words at a loud volume to test nerve clarity. For an infant or a child with severe language delays who cannot repeat words, the audiologist adapts this into a Speech Detection Threshold (SDT) or Speech Awareness Threshold (SAT). Instead of requiring comprehension, the audiologist just says “Ba ba ba” and looks for a VRA head-turn to verify the softest volume at which the child simply notices a voice is present.